Guadamuz, TE and Kunawararak, P and Beyrer, C and Pumpaisanchai, J and Wei, C and Celentano, DD  (2010) HIV prevalence, sexual and behavioral correlates among Shan, Hill tribe, and Thai male sex workers in Northern Thailand.  AIDS Care - Psychological and Socio-Medical Aspects of AIDS/HIV, 22 (5).  597 - 605.  ISSN 0954-0121