%0 Journal Article %T Estimating the population size of men who have sex with men in the United States to obtain HIV and syphilis rates %A Purcell, David W. %A Johnson, Christopher H. %A Lansky, Amy %A Prejean, Joseph %A Stein, Renee %A Denning, Paul %A Gau, Zaneta %A Weinstock, Hillard %A Su, John %A Crepaz, Nicole %D 2012 %R 10.2174/1874613601206010098 %P 98-107 %J The Open AIDS Journal %V 6 %2 ISSN: 1874-6136 %1 PMCID: PMC3462414