RT Journal Article SR Electronic T1 Capture-recapture methods and respondent-driven sampling: their potential and limitations JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 267 OP 268 DO 10.1136/sti.2011.049171 VO 87 IS 4 A1 Yakir Berchenko A1 Simon D W Frost YR 2011 UL http://sti.bmj.com/content/87/4/267.abstract AB