Undiagnosed patients with cystic fibrosis.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003550:Cystic Fibrosis / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D012044:Regression Analysis; D013542:Sweat / Q000032:analysis; D014481:United States; D044465:White People