title: Letter: Cystic fibrosis with edema and falsely negative sweat test.
mesh_terms: D002712:Chlorides / Q000032:analysis*; D003550:Cystic Fibrosis / Q000150:complications / Q000175:diagnosis*; D004487:Edema / Q000209:etiology; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D007223:Infant; D012964:Sodium / Q000032:analysis; D013542:Sweat / Q000032:analysis*
chemical_list: D002712:Chlorides; D012964:Sodium