HIV-1 and other sexually transmitted infections in a cohort of female sex workers in Chiang Rai, Thailand
K. Limpakarnjanarat, T. D. Mastro, S. Saisorn, W. Uthaivoravit, J. Kaewkungwal, S. Korattana, N. L. Young, S. A. Morse, D. S. Schmid, B. G. Weniger, and P. Nieburg
Sex Transm Infect. 1999 February; 75(1): 30–35. PMCID: PMC1758174