Diagnosis of cystic fibrosis.
D000367:Age Factors; D002675:Child, Preschool; D003550:Cystic Fibrosis / Q000175:diagnosis*; D003951:Diagnostic Errors; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D012964:Sodium / Q000032:analysis; D013542:Sweat / Q000032:analysis
D012964:Sodium