The Veterans Administration Cooperative Study on Gastric Ulcer. 1. Goals and design.
D000328:Adult; D000367:Age Factors; D000368:Aged; D004381:Duodenal Ulcer / Q000150:complications; D005500:Follow-Up Studies; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011859:Radiography; D012008:Recurrence; D013274:Stomach Neoplasms / Q000150:complications / Q000000981:diagnostic imaging; D013276:Stomach Ulcer / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000601:surgery / Q000628:therapy; D013997:Time Factors