Symptom diagnosis: optimal subsets for upper abdominal pain.
D000005:Abdomen; D000008:Abdominal Neoplasms / Q000175:diagnosis; D002769:Cholelithiasis / Q000175:diagnosis; D003201:Computers; D003937:Diagnosis, Differential; D004381:Duodenal Ulcer / Q000175:diagnosis; D006548:Hernia, Diaphragmatic / Q000175:diagnosis; D006801:Humans; D007414:Intestinal Neoplasms / Q000175:diagnosis; D008297:Male; D010146:Pain; D011336:Probability; D013276:Stomach Ulcer / Q000175:diagnosis