Factors associated with HIV seroconversion in gay men in England at the start of the 21st century
N Macdonald, G Elam, F Hickson, J Imrie, C A McGarrigle, K A Fenton, K Baster, H Ward, V L Gilbart, R M Power, B G Evans
Sexually Transmitted Infections Feb 2008, 84 (1) 8-13; DOI: 10.1136/sti.2007.027946