Underestimation of HIV prevalence in surveys when some people already know their status, and ways to reduce the bias

Floyd S, Molesworth A, Dube A, Crampin AC, Houben R, Chihana M, Price A, Kayuni N, Saul J, French N, Glynn JR. Underestimation of HIV prevalence in surveys when some people already know their status, and ways to reduce the bias. AIDS. 2013; 27(2): 233-42.