Benefits from mass evaluation of school children for heart disease (experience with 6,625 children).
D002140:California; D002648:Child; D002662:Child Health Services; D002675:Child, Preschool; D006331:Heart Diseases / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D008403:Mass Screening; D010701:Phonocardiography; D012572:School Health Services