Meiksin, Rebecca; Melendez-Torres, GJ; Falconer, Jane; Witzel, T Charles; Weatherburn, Peter; Bonell, Chris; (2021) eHealth Interventions to Address Sexual Health, Substance Use, and Mental Health Among Men Who Have Sex With Men: Systematic Review and Synthesis of Process Evaluations. Journal of medical Internet research, 23 (4). e22477. ISSN 1439-4456 DOI: https://doi.org/10.2196/22477

Witzel, T Charles; Weatherburn, Peter; Bourne, Adam; Rodger, Alison J; Bonell, Chris; Gafos, Mitzy; Trevelion, Roy; Speakman, Andrew; Lampe, Fiona; Ward, Denise; +9 more... Dunn, David T; Gabriel, Michelle M; McCabe, Leanne; Harbottle, Justin; Moraes, Yolanda Collaco; Michie, Susan; Phillips, Andrew N; McCormack, Sheena; Burns, Fiona M; (2020) Exploring Mechanisms of Action: Using a Testing Typology to Understand Intervention Performance in an HIV Self-Testing RCT in England and Wales. International journal of environmental research and public health, 17 (2). p. 466. ISSN 1661-7827 DOI: https://doi.org/10.3390/ijerph17020466 Item availability may be restricted.

Witzel, TC; (2020) HIV Self-testing for Men Who Have Sex With Men (MSM) in England and Wales: A multi-method study of self-testing intervention development and evaluation. PhD (research paper style) thesis, London School of Hygiene & Tropical Medicine. DOI: https://doi.org/10.17037/PUBS.04657360

Miners, Alec; Nadarzynski, Tom; Witzel, Charles; Phillips, Andrew N; Cambiano, Valentina; Rodger, Alison J; Llewellyn, Carrie D; (2019) Preferences for HIV testing services among men who have sex with men in the UK: A discrete choice experiment. PLOS MEDICINE, 16 (4). e1002779-. ISSN 1549-1277 DOI: https://doi.org/10.1371/journal.pmed.1002779

Witzel, T Charles; Gabriel, Michelle M; McCabe, Leanne; Weatherburn, Peter; Gafos, Mitzy; Speakman, Andrew; Pebody, Roger; Burns, Fiona M; Bonell, Chris; Lampe, Fiona C; +6 more... Dunn, David T; Ward, Denise; Harbottle, Justin; Phillips, Andrew N; McCormack, Sheena; Rodger, Alison J; (2019) Pilot phase of an internet-based RCT of HIVST targeting MSM and transgender people in England and Wales: advertising strategies and acceptability of the intervention. BMC infectious diseases, 19 (1). 699-. ISSN 1471-2334 DOI: https://doi.org/10.1186/s12879-019-4247-1

Witzel, TC; Bourne, A; Burns, FM; Rodger, AJ; McCabe, L; Gabriel, MM; Gafos, M; Ward, D; Collaco-Moraes, Y; Dunn, DT; +8 more... Speakman, A; Bonell, C; Pebody, R; Lampe, FC; Harbottle, J; Phillips, AN; McCormack, S; Weatherburn, P; (2019) HIV self-testing intervention experiences and kit usability: results from a qualitative study among men who have sex with men in the SELPHI (Self-Testing Public Health Intervention) randomized controlled trial in England and Wales. HIV MEDICINE, 21 (3). pp. 189-197. ISSN 1464-2662 DOI: https://doi.org/10.1111/hiv.12818

Gabriel, Michelle M; Dunn, David T; Speakman, Andrew; McCabe, Leanne; Ward, Denise; Witzel, T Charles; Harbottle, Justin; Collins, Simon; Gafos, Mitzy; Burns, Fiona M; +5 more... Lampe, Fiona C; Weatherburn, Peter; Phillips, Andrew; McCormack, Sheena; Rodger, Alison J; (2018) Protocol, rationale and design of SELPHI: a randomised controlled trial assessing whether offering free HIV self-testing kits via the internet increases the rate of HIV diagnosis. BMC infectious diseases, 18 (1). 531-. ISSN 1471-2334 DOI: https://doi.org/10.1186/s12879-018-3433-x

Witzel, T Charles; Guise, Andy; Nutland, Will; Bourne, Adam; (2016) It Starts With Me: Privacy concerns and stigma in the evaluation of a Facebook health promotion intervention. Sexual health, 13 (3). pp. 228-233. ISSN 1448-5028 DOI: https://doi.org/10.1071/SH15231

Witzel, T Charles; Melendez-Torres, GJ; Hickson, Ford; Weatherburn, Peter; (2016) HIV testing history and preferences for future tests among gay men, bisexual men and other MSM in England: results from a cross-sectional study. BMJ open, 6 (9). e011372-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2016-011372

Witzel, TC; Rodger, AJ; (2016) New initiatives to develop self-testing for HIV. Current opinion in infectious diseases. ISSN 0951-7375 DOI: https://doi.org/10.1097/QCO.0000000000000336

Mowlabocus, Sharif; Harbottle, Justin; Witzel, Charlie; (2014) What we can't see? Understanding the representations and meanings of UAI, barebacking, and semen exchange in gay male pornography. Journal of homosexuality, 61 (10). pp. 1462-1480. ISSN 0091-8369 DOI: https://doi.org/10.1080/00918369.2014.928581 Full text not available from this repository.

Mowlabocus, Sharif; Harbottle, Justin; Witzel, Charlie; (2013) Porn laid bare: Gay men, pornography and bareback sex. Sexualities, 16 (5-6). pp. 523-547. DOI: https://doi.org/10.1177/1363460713487370 Full text not available from this repository.