RT Journal Article SR Electronic T1 Follow up study of sexually transmitted disease (STD), sexual practice and human immunodeficiency virus (HIV) serology in homosexual men attending an STD clinic. JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 279 OP 280 DO 10.1136/sti.63.4.279-a VO 63 IS 4 A1 R D Maw A1 J Connolly A1 S Johnston A1 J McKirgan A1 J McNeill A1 J Russell YR 1987 UL http://sti.bmj.com/content/63/4/279.2.abstract AB