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Clinical Evidence 74 publications

Head & Neck Tumours

Head, Neck & Orbit

Tumours in the head and neck lie close to critical anatomical structures, and in recurrent disease the surgical and radiotherapy options are often exhausted. In this context electrochemotherapy is considered for palliative local control and symptom control; mucosal sites form a separate group of technical difficulty.

74total publications
39clinical studies
8preclinical studies
15reviews
1998–2026publication span

Evidence Status by Regime

Reversible electroporation (RE-ECT)

66publications
35clinical
6preclinical

Clinical Evidence

1998–2026 · In Routine Clinical Use

Irreversible electroporation (IRE-ECT)

8publications
4clinical
2preclinical

Early Clinical Evidence

2015–2026 · Near Clinical Adoption

Mechanisms Reported in This Area

Terms were detected by automatic matching over publication abstracts; the figure gives the number of publications containing the term.

Increased Intracellular Bleomycin Accumulation 30 Reversible Membrane Permeabilisation 12 Muscle Contraction and Anaesthesia Requirement 9 Irreversible Pore Formation and Cell Death 9 Necrosis and Necroptosis 7 Increased Intracellular Cisplatin Accumulation 7 Potentiation of Cytotoxic Drug Permeability 5 Electric Field Distribution and Modelling 5 Gene Electrotransfer (Plasmid DNA) 4 Electrode Geometry and Placement 4 Systemic / Abscopal Immune Response 4 Apoptosis Induction 4

Study Type Distribution

Bar length is scaled to the most common study type; the percentage gives the share of the whole area. Colour marks the evidence tier of the study type, the same scale as the evidence map.

Study typePublicationsShare within this area
Randomized Clinical Trial2
3%
Prospective Clinical Study4
5%
Clinical Study27
36%
Retrospective Clinical Study3
4%
Case Series3
4%
Case Report11
15%
Systematic Review / Meta-Analysis4
5%
Review11
15%
Animal Study7
9%
In Silico / Modelling1
1%
Editorial / Letter1
1%

Literature Evidence Table

74 publications listed in order of evidence strength. Click a title to open the citation, mechanism and full abstract drawer.

RegimePublicationYearStudy typeModelMechanismAbstract
Reversible
Perri et al · Cancers (Basel)
2021Randomized Clinical TrialHumanIncreased Intracellular Bleomycin Accumulation, Immune Checkpoint Inhibitor CombinationBackground: A significant proportion of patients with head and neck squamous cell carcinoma (HNSCC) have advanced-stage disease (stages III to IVB) that do not respond to therapy despite agg…
Reversible
Plaschke et al · Laryngoscope Investig Otolaryngol
2019Randomized Clinical TrialHumanCalcium Electroporation and ATP Depletion, Necrosis and NecroptosisBackground: Calcium electroporation is a novel cancer treatment, which combines temporary cell permeability from electroporation with a high influx of calcium intracellularly resulting in ca…
Irreversible
Khudayberganov · –
2024Prospective Clinical StudyHumanIrreversible Pore Formation and Cell Death, Reversible Membrane PermeabilisationIrreversible electroporation (IRE) is a novel non-thermal tissue ablation technology. The objective of this study was to evaluate the safety and efficacy of IRE in the treatment of adenotons…
Reversible
Al-Hadithy et al · Int J Surg
2018Prospective Clinical StudyHumanMetastatic spread of malignant tumours to skin is a well described phenomenon with incidence of approximately 0.7-9% of all metastases depending on histological type of primary cancer. Elect…
Reversible
Bertino et al · Eur J Cancer
2016Prospective Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationElectrochemotherapy is an effective and safe method for local treatment of cutaneous and subcutaneous tumours, where electric pulses cause increased permeability of cell membranes in the tum…
Reversible
Bertino et al · http://isrctn.com/
2015Prospective Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationElectrochemotherapy is an effective and safe method for local treatment of cutaneous and subcutaneous tumours, where electric pulses cause increased permeability of cell membranes in the tum…
Irreversible
Li et al · J Clin Endocrinol Metab
2026Clinical StudyHumanNanosecond Pulsed Electric Field (nsPEF), Reversible Membrane PermeabilisationContext Nanosecond pulsed electric field (nsPEF) ablation has gradually been applied in clinical practice. However, no studies have reported its application in low-risk papillary thyroid mic…
Reversible
Latini et al · J Clin Med
2025Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Electric Field Distribution and ModellingBackground : According to the ISSVA 2018 classification, arteriovenous malformations (AVMs) are high-flow vascular malformations, distinct from low-flow lesions. About 60% of extracranial AV…
Reversible
Bertino et al · Eur J Surg Oncol
2024Clinical StudyHumanThe aim of this multicenter study was to evaluate the effectiveness and safety of electrochemotherapy (ECT) for the treatment of mucosal tumors in the head and neck. A total of 71 patients w…
Reversible
Barca et al · Oral and Maxillofacial Surgery Cases
2023Clinical StudyHumanTreatment of advanced-stage head and neck cutaneous squamous cell carcinoma is a challenge for maxillofacial surgeons, oncologists, and radiotherapists. These carcinomas respond with difficu…
Reversible
Groselj · Radiol Oncol
2022Clinical StudyHumanInterleukin-12 Mediated Immune Stimulation, Gene Electrotransfer (Plasmid DNA)Background: Immune therapies are currently under intensive investigation providing in many cases excellent responses in different tumors. Other possible approach for immunotherapy is a targe…
Reversible
Krt et al · Front Oncol
2022Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Electrode Geometry and PlacementIntroduction: The study aims to demonstrate a combination of superselective catheterization and electrochemotherapy as a feasible and effective new technological approach in treating high-fl…
Reversible
Maglitto et al · Eur Rev Med Pharmacol Sci
2022Clinical StudyHumanObjective: The aim of this study was to identify features mainly involved in determining the partial response (PR) to the Electrochemotherapy (ECT) in patients with recurrent and/or metastat…
Reversible
Wolff et al · Biomedicines
2022Clinical StudyHumanMitochondrial Dysfunction and Oxidative Stress, Immunogenic Cell Death (ICD)In modern oncology, therapies are based on combining monotherapies to overcome treatment resistance and increase therapy precision. The application of microsecond-pulsed electric fields (PEF…
Reversible
Condello et al · Cancers (Basel)
2021Clinical StudyHumanApoptosis Induction, Potentiation of Cytotoxic Drug PermeabilityWe investigated the chemosensitizing effect of electroporation (EP), which, using electrical pulses, permeabilizes cancer cells to drugs. The study involved two human hypopharyngeal and tong…
Reversible
Riva et al · J Clin Med
2021Clinical StudyHumanHaemostasis and Bleeding ControlBackground: Primary or recurrent head and neck cancer of skin or mucosa represents a challenge for clinicians and could be debilitating for the patient. Electrochemotherapy (ECT) emerged as …
Reversible
Zimmermann et al · Acta Otolaryngol
2021Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Haemostasis and Bleeding ControlBackground: The role of electrochemotherapy (ECT) using intratumoral bleomycin and electroporation as a first line treatment for oral tongue carcinoma has not been defined. Aims/objectives: …
Reversible
Longo et al · Cancers (Basel)
2020Clinical StudyHumanHead and neck squamous cell carcinomas (SCCHN) are not rare malignancies and account for 7% of all solid tumors. Prognosis of SCCHN patients strongly depends on tumor extension, site of onse…
Reversible
Bonadies et al · Acta Derm Venereol
2019Clinical StudyHumanSkin malignancies of the head and neck inflict significant structural, functional, and cosmetic burdens upon those affected. We retrospectively addressed electrochemotherapy anti-tumour effi…
Reversible
Longo et al · Oral Oncol
2019Clinical StudyHumanPurpose: To describe outcomes of Electrochemotherapy as palliative treatment in patients with advanced head and neck (H&N) tumours. Methods: Ninety-three patients (120 treatment sessions) wi…
Reversible
Zakelj et al · Oncol Rep
2019Clinical StudyHumanIncreased Intracellular Cisplatin Accumulation, Increased Intracellular Bleomycin AccumulationElectrochemotherapy is an established local ablative method used for the treatment of different tumor types, including tumors of the head and neck area. Clinical studies have demonstrated a …
Reversible
Pichi et al · Acta Otorhinolaryngol Ital
2018Clinical StudyHumanElectrochemotherapy (ECT) is a well established treatment strategy for skin tumuors. The aim of this study was to evaluate the feasibility and efficacy of electrochemotherapy in the palliati…
Reversible
Plaschke et al · Head Neck
2018Clinical StudyHumanMuscle Contraction and Anaesthesia RequirementBackground: Electrochemotherapy is an established treatment for cutaneous tumors. This study aimed at determining efficacy of electrochemotherapy in recurrent head and neck cancer. Methods: …
Reversible
Plaschke et al · Eur J Cancer
2017Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationAim: Electrochemotherapy is an effective local treatment for cutaneous tumours and metastases. In this prospective trial, six European institutions investigated electrochemotherapy in recurr…
Reversible
Landström et al · Acta Otolaryngol
2015Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationConclusion: ECT can be a safe curative mono modality treatment, especially in tongue cancer. The future role for ECT in head and neck cancer needs to be further investigated. Introduction: E…
Reversible
Campana et al · Eur J Surg Oncol
2014Clinical StudyHumanElectrochemotherapy (ECT) holds promise as a minimally invasive palliative tool for selected patients with peristomal tumors. We present the favorable short-term outcome of three patients (t…
Reversible
Landström et al · Acta Otolaryngol
2014Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Systemic / Abscopal Immune ResponseConclusion: Electrochemotherapy (ECT) is an efficacious treatment. It should, however, be used with some caution in the treatment of head and neck cancer. Objectives: To assess local tumor c…
Reversible
Rossi et al · European Journal of Surgical Oncology (EJSO)
2013Clinical StudyHumanS56 2 Universita Insubria, Varese, Italy University Catholique de Louvian, Bruxelles, Italy * Corresponding author. Bellini Maria Irene ,Tor Vergata University, Roma, Italy. E-mail address:…
Reversible
Gargiulo et al · Ann Surg
2012Clinical StudyHumanPotentiation of Cytotoxic Drug Permeability, Muscle Contraction and Anaesthesia RequirementObjective: To evaluate and confirm the efficacy and safety of electrochemotherapy (ECT) using bleomicyn in a large series of non-melanoma head and neck cancers. Background: ECT combines chem…
Reversible
Grau et al · Annals of Oncology
2012Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationECT is the administration of electrical pulses in the tumour during perfusion of chemotherapy allowing the introduction of the drug in neoplastic cell. H&N regional relapse no suitable for l…
Reversible
Mevio et al · Tumori
2012Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Reversible Membrane PermeabilisationAims and background: Electrochemotherapy is a tumor ablation modality providing delivery into the cell interior of impermeant or poorly permeant chemotherapeutic drugs such as cisplatin and …
Reversible
Gargiulo et al · Annals of Surgery
2010Clinical StudyHumane read with great interest the article entitled, “Electrochemotherapy: Aspects of Preclinical Development and Early Clinical Experience” published in your esteemed journal in March 2007.1 An…
Reversible
Landström et al · Acta Otolaryngol
2010Clinical StudyHumanIncreased Intracellular Bleomycin AccumulationConclusion: Electroporation therapy appears to be a safe treatment achieving excellent local tumor control and very good functional results in our study and it should be further clinically e…
Reversible
Vielsmeier et al · Biomedicines
2025Retrospective Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Potentiation of Cytotoxic Drug PermeabilityBackground/Objectives: Bleomycin electrosclerotherapy (BEST), which combines intralesional bleomycin administration with electroporation, enhances drug uptake and has shown efficacy in treat…
Reversible
Barca et al · Int J Environ Res Public Health
2023Retrospective Clinical StudyHumanAdvanced oral squamous cell carcinomas represent a major challenge for maxillofacial surgeons, oncologists and radiation therapists. They also account for a large share of healthcare costs. …
Reversible
Campana et al · Br J Oral Maxillofac Surg
2014Retrospective Clinical StudyHumanIncreased Intracellular Bleomycin Accumulation, Increased Intracellular Cisplatin AccumulationElectrochemotherapy increases the permeability of tumours to drugs by electric voltages applied locally. Its value in tumours of the head and neck is unknown. We retrospectively reviewed a 2…
Irreversible
Khasanov et al · J Clin Med
2026Case SeriesHumanIrreversible Pore Formation and Cell Death, Reversible Membrane PermeabilisationBackground/Objectives: Irreversible electroporation (IRE) is a non-thermal tissue ablation technology, offering potential advantages such as reductions in pain, bleeding, and procedural time…
Irreversible
Sarafoleanu et al · Otolaryngol Head Neck Surg
2026Case SeriesHumanIrreversible Pore Formation and Cell Death, Reversible Membrane PermeabilisationObjective: To evaluate the safety and efficacy of irreversible electroporation for non-thermal ablation of tonsils in adults. Study design: Prospective interventional case series of 24 adult…
Reversible
Sampate et al · IJARS
2025Case SeriesHumanIntroduction: Head and Neck Carcinomas (HNC) are a significant cancer burden in India and worldwide, often necessitating palliative care due to their locoregional relapse. Electrochemotherap…
Reversible
Chiari et al · J Stomatol Oral Maxillofac Surg
2026Case ReportHumanIncreased Intracellular Bleomycin Accumulation, Necrosis and NecroptosisBackground: Follicular dendritic cell sarcoma (FDCS) is a rare neoplasm arising from follicular dendritic cells, with a predilection for extranodal sites. FDCS of the tonsil is exceptionally…
Reversible
Bonadies et al · Biomedicines
2023Case ReportHumanIncreased Intracellular Bleomycin AccumulationBackground: Brooke-Spiegler syndrome is a rare autosomal dominant disorder characterized by the continuous development of multiple benign skin appendage tumors. It is treated usually by repe…
Irreversible
Xu et al · QJM
2022Case ReportHumanIrreversible Pore Formation and Cell Death, Reversible Membrane PermeabilisationIrreversible electroporation (IRE) is a novel non-thermal ablation modality and has unique advantages for the treatment of tumors adjacent to vital structures. Our case highlights that IRE m…
Reversible
Landström et al · Anticancer Res
2021Case ReportHumanIncreased Intracellular Bleomycin AccumulationBackground/aim: Electrochemotherapy (ECT) is a cancer treatment modality where the efficacy of a chemotherapeutic agent is enhanced by an electrical field. It is an established palliative tr…
Reversible
Pichi et al · JAMA Otolaryngol Head Neck Surg
2020Case ReportHumanResponse to Electrochemotherapy in a Patient With Advanced Oropharyngeal Squamous Cell Carcinoma Figure 1. Axial T1 With Gadolinium Sequence Magnetic Resonance Imaging Showing an Infiltrativ…
Reversible
Salehi et al · Vet Res Forum
2018Case ReportHumanIncreased Intracellular Bleomycin AccumulationA five-year-old female African hedgehog ( Atelerix albiventris ) was referred for a one month growing oral mass. The hedgehog was quiet, alert and responsive, with a 1.00 × 1.50 cm ulcerated…
Reversible
Vitfell-Rasmussen et al · Acta Oncol
2017Case ReportHumanAggressive fibromatosis also known as desmoid tumors constitute 3% of soft tissue tumors and 0.03% of all cancers [1]. They most commonly occur in women after childbirth and the gender ratio…
Reversible
Groselj et al · Biomed Eng Online
2015Case ReportHumanElectrode Geometry and Placement, Electric Field Distribution and ModellingBackground: Electrochemotherapy provides highly effective local treatment for a variety of tumors. In deep-seated tumors of the head and neck, due to complex anatomy of the region or inabili…
Reversible
Holdsworth et al · JPRAS Open
2015Case ReportHumanA 65-year-old man presented with an uncontrolled Merkel cell carcinoma on his chest that originated from his forearm. He previously had an amputation at the shoulder joint, but his disease r…
Irreversible
Meijerink et al · J Vasc Interv Radiol
2015Case ReportHumanReversible Membrane Permeabilisation, Irreversible Pore Formation and Cell DeathA 74-year-old man presented with a small locoregional, histopathologically proven, fluorodeoxyglucose positron emission tomography/computed tomography-avid recurrence of follicular thyroid c…
Reversible
Panje et al · Am J Rhinol
2000Case ReportHumanIncreased Intracellular Bleomycin Accumulation, Reversible Membrane PermeabilisationThe purpose of this article is to introduce the concept of endoscopic and electroporation therapy for the treatment of sinonasal carcinomas. Electroporation therapy is a technique that combi…
Reversible
Chiari et al · Eur Arch Otorhinolaryngol
2025Systematic Review / Meta-AnalysisHumanSystemic / Abscopal Immune ResponseObjective: The primary objective of this review is to assess the survival outcomes of patients affected by oral cavity and oropharyngeal squamous cell carcinoma (SCC) treated with electroche…
Reversible
Jiménez-Labaig et al · Cancer Treat Rev
2024Systematic Review / Meta-AnalysisHumanCalcium Electroporation and ATP Depletion, Haemostasis and Bleeding ControlBackground: Head and neck squamous cell carcinoma (HNSCC) presents an ideal scenario for intratumoral therapies (IT), due to its local recurrence pattern and frequent superficial extension. …
Reversible
Lenzi et al · Eur Arch Otorhinolaryngol
2017Systematic Review / Meta-AnalysisHumanNecrosis and NecroptosisElectroporation, also known as electrochemotherapy, combines an antineoplastic agent with electroporation, causing localized progressive necrosis in the treated area. Today it is primarily u…
Reversible
Plaschke et al · Acta Oncol
2016Systematic Review / Meta-AnalysisHumanBackground: Electrochemotherapy, the combination of electroporation and chemotherapy, is mainly used in the palliative setting for treatment of cutaneous and subcutaneous metastases; however…
Reversible
Mahendra Prabu · –
2026ReviewLiterature AnalysisReversible Membrane Permeabilisation, Increased Intracellular Bleomycin AccumulationBackground: Head and Neck Cancer (HNC) is still considered a major global health problem because it usually presents itself with a high incidence of recurrence and associated disabilities [1…
Reversible
Cariti et al · Acta Otorhinolaryngol Ital
2024ReviewHumanHead and neck cancers are mostly represented by squamous cell carcinoma. Despite effective treatment of primary tumours, local recurrences and metastases are frequent, with up to a 60% risk …
Reversible
Morozas et al · Front Oncol
2024ReviewLiterature AnalysisElectric Field Distribution and Modelling, Increased Intracellular Bleomycin AccumulationHead and neck cancer continues to be among the most prevalent types of cancer globally, yet it can be managed with appropriate treatment approaches. Presently, chemotherapy and radiotherapy …
Reversible
Pisani et al · Cancers (Basel)
2022ReviewLiterature AnalysisIncreased Intracellular Bleomycin Accumulation, Increased Intracellular Cisplatin AccumulationSquamous cell carcinoma is the most common malignancy that arises in the head-and-neck district. Traditional treatment could be insufficient in case of recurrent and/or metastatic cancers; f…
Reversible
Enokida et al · Cancers (Basel)
2021ReviewLiterature AnalysisImmune Checkpoint Inhibitor CombinationDespite recent advances in the development of chemotherapeutic drug, treatment for advanced cancer of the head and neck cancer (HNC) is still challenging. Options are limited by multiple fac…
Reversible
de Bree et al · Curr Opin Otolaryngol Head Neck Surg
2020ReviewHumanIncreased Intracellular Bleomycin AccumulationPurpose of review: Electrochemotherapy (ECT) is increasingly used in different settings in head and neck cancer patients when conventional treatment options are not available. Recent finding…
Reversible
De Virgilio et al · Oncol Lett
2018ReviewLiterature AnalysisPatients affected by aggressive neoplasms with a high propensity to metastasize to the skin, including some types of head and neck cancer, may benefit from electrochemotherapy, a modality th…
Reversible
Benazzo et al · Handbook of Electroporation
2017ReviewLiterature AnalysisElectrode Geometry and Placement, Increased Intracellular Bleomycin AccumulationIn the head and neck area, electrochemotherapy (ECT) is currently implemented for the treatment of recurrent and/or metastatic cutaneous, subcutaneous, mucosal, or deep-seated tumors of any …
Reversible
Ribero et al · Radiol Oncol
2016ReviewLiterature AnalysisBackground: Metastatic extraorbital sebaceous carcinoma is a rare event that could involve the head and neck. The treatment of choice for the initial stage of the disease is surgery and/or r…
Reversible
Landström FJ · –
2015ReviewLiterature AnalysisIncreased Intracellular Bleomycin Accumulation, Antivascular Effect and Vessel DisruptionFredrik Landström (2015): Curative Electrochemotherapy in the Head and Neck Area. Örebro Studies in Medicine 117. Electrochemotherapy (ECT) is a local cancer treatment modality in which the …
Reversible
Soni · Ecancermedicalscience
2015ReviewLiterature AnalysisHidradenocarcinoma is a rare malignant adnexal tumour which arises from the intradermal duct of eccrine sweat glands. The head and neck are the most common sites of hidradenocarcinoma, but r…
Irreversible
Tao et al · Acta Otolaryngol
2025Animal StudyAnimal (In Vivo)Irreversible Pore Formation and Cell Death, Reversible Membrane PermeabilisationBackground: Irreversible electroporation (IRE)/nanoknife is a nonthermal technique for ablating solid tumors. Objectives: To investigate the application of IRE for ablating tonsil tissues in…
Irreversible
Lv et al · Technol Cancer Res Treat
2019Animal StudyAnimal (In Vivo)Reversible Membrane Permeabilisation, Irreversible Pore Formation and Cell DeathBackground: Nonthermal irreversible electroporation is a minimally invasive surgery technology that employs high and brief electric fields to ablate undesirable tissues. Nonthermal irreversi…
Reversible
Quaglino et al · Cancers (Basel)
2011Animal StudyAnimal (In Vivo)Gene Electrotransfer (Plasmid DNA)DNA vaccination exploits a relatively simple and flexible technique to generate an immune response against microbial and tumor-associated antigens (TAAs). Its effectiveness is enhanced by th…
Reversible
Fujimoto et al · J Int Med Res
2005Animal StudyAnimal (In Vivo)Increased Intracellular Cisplatin Accumulation, Potentiation of Cytotoxic Drug PermeabilityThe aim of this study was to determine the effects of low-voltage electrochemotherapy with intraperitoneal cisplatin on hamster oral fibrosarcoma. Oral fibrosarcoma was transplanted submucos…
Reversible
Omura et al · International Journal of Oral and Maxillofacial Surgery
2000Animal StudyAnimal (In Vivo)Increased Intracellular Bleomycin Accumulation, Necrosis and NecroptosisThis study evaluated the effects of electrochemotherapy (ECT) with intratumoral injection of bleomycin (BLM) on the chemically induced tongue cancer model in the hamster. Intratumoral inject…
Reversible
Omura et al · J Oral Maxillofac Surg
1999Animal StudyAnimal (In Vivo)Increased Intracellular Bleomycin AccumulationPurpose: This study investigated the in vivo antitumor effects of electrochemotherapy (ECT) using electroporation and bleomycin in a hamster tongue cancer model to assess its clinical applic…
Reversible
Hasegawa et al · J Oral Pathol Med
1998Animal StudyAnimal (In Vivo)Increased Intracellular Bleomycin AccumulationElectrochemotherapy (ECT) is a new technique that enhances the antitumor effect of various anticancer agents by delivering high-voltage electrical impulses to the tumor. A rat squamous cell …
Reversible
Lopes et al · IEEE Trans. Instrum. Meas.
2026In Silico / ModellingComputational ModelTissue Conductivity and Impedance Change, Electric Field Distribution and ModellingElectroporation (EP)–based cancer therapies, such as electrochemotherapy (ECT) and irreversible electroporation (IRE), require accurate characterization of tissue electrical properties to pr…
Reversible
De Virgilio et al · Tumori
2013Editorial / LetterHumanWe would like to take the opportunity to comment on the paper by Mevio et al.1 in the May-June 2012 issue of Tumori titled “Electrochemotherapy for the treatment of recurrent head and neck c…

Limitations

The counts on this page are bounded by the scope of the source PDF archive and are not a systematic review of the area's literature. Study type and mechanism labels are derived automatically; for critical decisions consult the full texts of the publications listed. The evidence level reflects the number of publications, not their methodological quality.