RT Journal Article SR Electronic T1 Rectal gonorrhoea as an independent risk factor for HIV infection in homosexual males. JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 335 OP 336 DO 10.1136/sti.71.5.335 VO 71 IS 5 A1 Burn, S A1 Horner, P J YR 1995 UL http://sti.bmj.com/content/71/5/335.abstract AB