title: Clinical policy for the initial approach to patients presenting with a chief complaint of nontraumatic acute abdominal pain. American College of Emergency Physicians.
mesh_terms: D000006:Abdomen, Acute / Q000175:diagnosis*; D015746:Abdominal Pain / Q000175:diagnosis* / Q000209:etiology; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D010808:Physical Examination