Incidence and etiology of pneumonia, croup and bronchiolitis in preschool children belonging to a prepaid medical care group over a four-year period

health National Center for Biotechnology Information NCBI NLM MEDLINE Insurance humans pubmed abstract nih national institutes of health national library of medicine female male Child Infant preschool antibodies / analysis pneumonia / etiology respiratory syncytial viruses / isolation & purification washington serologic tests pneumonia / diagnosis respirovirus / isolation & purification mycoplasma / isolation & purification pmid:4347510 doi:10.1093/oxfordjournals.aje.a121492 h m foy m k cooney j t grayston bronchopneumonia / epidemiology* bronchopneumonia / etiology group practice laryngitis / diagnosis laryngitis / epidemiology* laryngitis / etiology mycoplasma infections orthomyxoviridae infections picornaviridae / isolation & purification pneumonia / epidemiology* virus diseases