NegotiatingCondomsSafe SexPower (Psychology)ContractsPersonnel ManagementSocial Control, FormalProstitutionCommerceConflict (Psychology)Sexual PartnersInternational CooperationPoliticsSex WorkersRate Setting and ReviewSexual BehaviorGame TheoryResearcher-Subject RelationsContraception BehaviorUnsafe SexCost ControlQualitative ResearchHIV InfectionsCambodiaMentorsCooperative BehaviorTobacco IndustryHeterosexualityInterviews as TopicInterpersonal RelationsGovernment AgenciesDrug CostsPhysician-Patient RelationsHealth Knowledge, Attitudes, PracticeSouth AfricaGaitWorld HealthCommunicationHealth PolicyInterprofessional RelationsDecision MakingWorld Health OrganizationMexicoRisk Reduction BehaviorAttitude of Health PersonnelLocomotionFaculty, MedicalRisk-TakingGreat BritainHealth PromotionSocial EnvironmentMotivationUnited StatesPublic HealthModels, TheoreticalSexually Transmitted DiseasesData CollectionFocus GroupsHealth BehaviorHealth Services ResearchAfrican AmericansAttitude to HealthQuestionnairesRisk Factors