title: Viagra use and sexual risk behaviour among gay men in London.
authors.affiliation: Department of Primary Care and Population Sciences and Royal Free Centre for HIV Medicine, Royal Free and University College Medical School, University College London, UK.
authors.forename: L
authors.initials: L
authors.lastname: Sherr
authors.forename: G
authors.initials: G
authors.lastname: Bolding
authors.forename: M
authors.initials: M
authors.lastname: Maguire
authors.forename: J
authors.initials: J
authors.lastname: Elford
mesh_terms: D003430:Cross-Sectional Studies; D015483:HIV Antibodies / Q000097:blood; D015658:HIV Infections / Q000453:epidemiology; D018451:Homosexuality, Male; D006801:Humans; D008131:London; D008297:Male; D010879:Piperazines / Q000008:administration & dosage*; D011687:Purines; D012309:Risk-Taking; D012725:Sexual Behavior; D000068677:Sildenafil Citrate; D013450:Sulfones; D011795:Surveys and Questionnaires
chemical_list: D015483:HIV Antibodies; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate