RT Journal Article SR Electronic T1 High rates of oral STIs among male sex workers in Vietnam JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 528 OP 528 DO 10.1136/sextrans-2013-051423 VO 90 IS 7 A1 Le Minh Giang A1 Michael C Clatts A1 Lloyd A Goldsamt A1 Gary Yu YR 2014 UL http://sti.bmj.com/content/90/7/528.abstract AB