Supplemental material for Defining and surveying key populations at risk of HIV infection: Towards a unified approach to eligibility criteria for respondent-driven sampling HIV biobehavioral surveys

Supplemental material for Defining and surveying key populations at risk of HIV infection: Towards a unified approach to eligibility criteria for respondent-driven sampling HIV biobehavioral surveys by Avi J Hakim, Lisa G Johnston, Samantha Dittrich, Dimitri Prybylski, Janet Burnett and Evelyn Kim in International Journal of STD & AIDS