AThe Kirby Institute, UNSW Sydney, Level 6, Wallace Wurth Building, Sydney, NSW2052, Australia.

BCentre for Social Research in Health, UNSW Sydney, Level 1, Goodsell Building, Sydney, NSW2052, Australia.

CUniversity of Johannesburg, PO Box 524, Auckland Park2006, South Africa.

DSydney Sexual Health Centre, South Eastern Sydney Local Health District, Level 3, Nightingale Wing, Sydney Eye Hospital, 8 Macquarie Street, Sydney, NSW2000, Australia.

ESTI Programs Unit, NSW Ministry of Health, 150 Albion Street, Surry Hills, NSW2010, Australia.

FThe Pacific Clinic, Level 2/670 Hunter Street, Newcastle West, NSW2302, Australia.

GNSW Sexual Health Infolink, NSW Ministry of Health, Locked Mail Bag 2030, St Leonards, NSW1590, Australia.

HCentre for Population Health, NSW Ministry of Health, Locked Mail Bag 2030, St Leonards, NSW1590, Australia.