A problem in the diagnosis of gastric ulcer.
D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans; D007813:Laparotomy; D008875:Middle Aged; D011859:Radiography; D013274:Stomach Neoplasms / Q000175:diagnosis; D013276:Stomach Ulcer / Q000175:diagnosis*