MacrolidesPrevalenceSteroidsErythromycinAnti-Bacterial AgentsAzithromycinKetolidesRoxithromycinJosamycinLeucomycinsMicrobial Sensitivity TestsTylosinChild WelfareClarithromycinDisabled ChildrenChild BehaviorSpiramycinDrug Resistance, BacterialLincosamidesRisk FactorsCross-Sectional StudiesVirginiamycinGonadal Steroid HormonesStreptococcus pneumoniaeReceptors, SteroidMiocamycinRNA, Ribosomal, 23SAge FactorsClindamycinDrug Resistance, MicrobialChild Health ServicesUnited StatesStreptograminsChild RearingRetrospective StudiesLincomycinQuestionnairesInfant, NewbornAge DistributionTime FactorsChild, InstitutionalizedPolyenesChild Behavior DisordersStreptococcus pyogenesFluoroquinolonesSex FactorsMycoplasma pneumoniaeChild PsychologyAnti-Infective AgentsProspective StudiesChild of Impaired ParentsBrazilPregnancyDrug Resistance, Multiple, BacterialSex DistributionIncidenceStreptogramin BPneumococcal InfectionsChild, OrphanedParentsTreatment OutcomeDental Care for ChildrenSocioeconomic FactorsChild Nutrition DisordersRural PopulationRespiratory Tract InfectionsSteroid 21-HydroxylaseHealth SurveysStreptomycesIndiaBronchiolitisUrban PopulationAsthmaCommunity-Acquired InfectionsMoraxella (Branhamella) catarrhalisFollow-Up StudiesChild Nutritional Physiological PhenomenaOleandomycinLactamsLogistic ModelsStreptococcal InfectionsHaemophilus influenzaeTetracyclinesSpain4-QuinolonesPneumonia, MycoplasmaChild LanguageMycoplasma hominisDrug UtilizationProgesteroneAnabolic AgentsPolymerase Chain ReactionObesitySeverity of Illness IndexChild MortalityGlucocorticoidsChinaCase-Control StudiesAnti-Inflammatory AgentsEstradiol