RT Journal Article SR Electronic T1 WHO guidelines for HIV/STI prevention and care among MSM and transgender people: implications for policy and practice JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 536 OP 538 DO 10.1136/sextrans-2013-051121 VO 89 IS 7 A1 Jenny Cohen A1 Ying-Ru Lo A1 Carlos F Caceres A1 Jeffrey D Klausner A1 For the WHO guideline working group YR 2013 UL http://sti.bmj.com/content/89/7/536.abstract AB