Generalizability in pediatric injury research: lumping vs. splitting.
Division of General and Emergency Pediatrics, Children's Memorial Hospital, Chicago, IL 60614.
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Christoffel
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012107:Research Design; D014947:Wounds and Injuries / Q000145:classification / Q000453:epidemiology* / Q000209:etiology