Measuring concurrent partnerships.
Epstein
Helen
H
Swidler
Ann
A
Gray
Ron
R
Reniers
George
G
Parker
Warren
W
Parkhurst
Justin
J
Short
Roger
R
Halperin
Daniel
D
D003075:Coitus; D005260:Female; D015658:HIV Infections / Q000635:transmission*; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D012747:Sexual Partners; D011795:Surveys and Questionnaires