S. Baral, C. H. Logie, A. Grosso, A. L. Wirtz, and C. Beyrer, Modified social ecological model: a tool to guide the assessment of the risks and risk contexts of HIV epidemics, BMC Public Health, vol.127, issue.6, pp.482-492, 2013.
DOI : 10.1007/s11524-005-9007-4

S. D. Baral, M. R. Friedman, S. Geibel, K. Rebe, B. Bozhinov et al., Male sex workers: practices, contexts, and vulnerabilities for HIV acquisition and transmission, The Lancet, vol.385, issue.9964, pp.260-27310, 2015.
DOI : 10.1016/S0140-6736(14)60801-1

URL : http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4504188

C. Beyrer, S. D. Baral, F. Van-griensven, S. M. Goodreau, S. Chariyalertsak et al., Global epidemiology of HIV infection in men who have sex with men, The Lancet, vol.380, issue.9839, pp.367-37710, 2012.
DOI : 10.1016/S0140-6736(12)60821-6

G. V. Bobashev, W. A. Zule, K. C. Osilla, T. L. Kline, and W. M. Wechsberg, Transactional Sex among Men and Women in the South at High Risk for HIV and Other STIs, Journal of Urban Health, vol.2, issue.Suppl 1, pp.32-4710, 2009.
DOI : 10.1007/s11524-009-9368-1

D. D. Heckathorn, Comment: Snowball versus Respondent-Driven Sampling, Sociological Methodology, vol.39, issue.1, pp.355-366, 2011.
DOI : 10.1111/j.0081-1750.2004.00152.x

D. M. Huebner, G. M. Rebchook, and S. M. Kegeles, Experiences of Harassment, Discrimination, and Physical Violence Among Young Gay and Bisexual Men, American Journal of Public Health, vol.94, issue.7, pp.94-1200, 2004.
DOI : 10.2105/AJPH.94.7.1200

A. Jolivet, Migrations, santé et soins en Guyane Retrieved from https, 2014.

T. Lane, S. B. Shade, J. Mcintyre, and S. F. Morin, Alcohol and Sexual Risk Behavior Among Men Who Have Sex with Men in South African Township Communities, AIDS and Behavior, vol.96, issue.6, pp.78-85, 2008.
DOI : 10.1007/s10461-008-9389-x

J. T. Lau, W. D. Cai, H. Y. Tsui, L. Chen, and J. Q. Cheng, Psychosocial Factors in Association with Condom Use During Commercial Sex Among Migrant Male Sex Workers Living in Shenzhen, Mainland China Who Serve Cross-Border Hong Kong Male Clients, AIDS and Behavior, vol.31, issue.Suppl 8, pp.939-94810, 2009.
DOI : 10.1007/s10461-009-9591-5

L. Vu, S. , L. Strat, Y. Barin, F. Pillonel et al., Population-based HIV-1 incidence in France, 2003-08: a modelling analysis, Lancet Infectious Diseases, vol.10, issue.1010, pp.682-68710, 2010.

L. Vu, S. Velter, A. Meyer, L. Peytavin, G. Guinard et al., Biomarker-based HIV incidence in a community sample of men who have sex with men, PLoS One, vol.7, issue.6, 2012.

S. Liu and R. Detels, Recreational Drug Use, Sexually Transmitted Diseases, vol.39, issue.4, pp.251-252, 2012.
DOI : 10.1097/OLQ.0b013e31824a0903

T. C. Mills, J. Paul, R. Stall, L. Pollack, J. Canchola et al., Distress and Depression in Men Who Have Sex With Men: The Urban Men???s Health Study, American Journal of Psychiatry, vol.161, issue.2, pp.278-285, 2004.
DOI : 10.1176/appi.ajp.161.2.278

C. E. Oldenburg, A. G. Perez-brumer, K. B. Biello, S. J. Landers, J. G. Rosenberger et al., Transactional Sex Among Men Who Have Sex With Men in Latin America: Economic, Sociodemographic, and Psychosocial Factors, American Journal of Public Health, vol.105, issue.5, pp.95-102, 2015.
DOI : 10.2105/AJPH.2014.302402

C. E. Oldenburg, A. G. Perez-brumer, S. L. Reisner, and M. J. Mimiaga, Transactional Sex and the HIV, 2015.