title: Changing patterns of sexual risk behavior among London gay men: 1998-2008.
authors.affiliation: Health Protection Agency, Centre for Infections, London, United Kingdom.
authors.forename: Sam
authors.initials: S
authors.lastname: Lattimore
authors.forename: Alicia
authors.initials: A
authors.lastname: Thornton
authors.forename: Valerie
authors.initials: V
authors.lastname: Delpech
authors.forename: Jonathan
authors.initials: J
authors.lastname: Elford