title: Significance of nocturnal abdominal pain: a prospective study.
mesh_terms: D000328:Adult; D005260:Female; D005502:Food; D005767:Gastrointestinal Diseases / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology*; D011446:Prospective Studies; D012890:Sleep; D013997:Time Factors