Sudden infant death syndrome: incidence at various altitudes.
D000531:Altitude; D001721:Birth Intervals; D001724:Birth Weight; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008423:Maternal Age; D009329:Nebraska; D011295:Prenatal Care; D012737:Sex Factors; D013398:Sudden Infant Death / Q000453:epidemiology*