Role of gastroscopy in gastric ulcer patients. Planning a prospective study.
D003362:Cost-Benefit Analysis; D003951:Diagnostic Errors; D005500:Follow-Up Studies; D005773:Gastroscopy / Q000592:standards; D006801:Humans; D011446:Prospective Studies; D012306:Risk; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000401:mortality / Q000601:surgery; D013276:Stomach Ulcer / Q000175:diagnosis* / Q000401:mortality / Q000601:surgery; D013997:Time Factors