Homeless PersonsLos AngelesWomenHomeless YouthWomen's HealthSubstance-Related DisordersHousingSexual BehaviorLogistic ModelsSocioeconomic FactorsRisk FactorsPublic HousingAdolescent BehaviorTrench FeverBartonella quintanaUnited StatesRisk-TakingQuestionnairesCross-Sectional StudiesSex FactorsRunaway BehaviorPregnant WomenBattered WomenUrban PopulationAge FactorsMental DisordersInterviews as TopicSan FranciscoJuvenile DelinquencyPediculusPregnancyWomen's Health ServicesHIV InfectionsLongitudinal StudiesPeer GroupNew York CityCohort StudiesVulnerable PopulationsPovertyAdolescent PsychologyWomen's RightsSingle Person