title: Population health looking upstream.
authors.forename: G A
authors.initials: GA
authors.lastname: Gellert
mesh_terms: D002140:California / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology* / Q000208:ethnology; D006801:Humans; D008297:Male; D012307:Risk Factors; D014744:Vietnam / Q000208:ethnology