Institution: | 1. Centre for Social Research in Health, UNSW Australia, Sydney, NSW, Australia;2. Public Health England, London, UK;3. Center for STI/HIV Epidemiological Studies of Catalonia (CEEISCAT/ASPCAT) and CIBERESP, Badalona, Catalonia, Spain;4. Centre for Information and Counseling on Reproductive Health – Tanadgoma, Tbilisi, Georgia |