title: Peptic ulcer disease in cystic fibrosis: an unusual occurrence in black adolescents.
mesh_terms: D000293:Adolescent; D001741:Black or African American; D003550:Cystic Fibrosis / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D010437:Peptic Ulcer / Q000175:diagnosis / Q000209:etiology*