TY  - JOUR
A1  - MacKellar, D.A.
A1  - Gallagher, K.M.
A1  - Finlayson, T.
A1  - Sanchez, T.
A1  - Lansky, A.
A1  - Sullivan, P.S.
T1  - Surveillance of HIV risk and prevention behaviors of men who have sex with men – A national application of venue-based, time-space sampling
Y1  - 2007
JF  - Public Health Reports 
VL  - 122
IS  - Suppl. 1
SP  - 39
EP  - -47

ER  -