Baral, Stefan, Chris Beyrer, Kathryn Muessig, Tonia Poteat, Andrea L. Wirtz, Michele R. Decker, Susan G. Sherman, and Deanna Kerrigan. "Burden of HIV among female sex workers in low-income and middle-income countries: a systematic review and meta-analysis." The Lancet infectious diseases 12, no. 7 (2012): 538-49.