AU - Vance VK TI - USe of upper gastrointestinal endoscopy PT - JOUR DP - 1979 TA - Archives of Internal Medicine pages = {944}, VI - 139 IP - 8 AID - 10.1001/archinte.1979.03630450086032 [doi] 4100 - http://dx.doi.org/10.1001/archinte.1979.03630450086032 SO - Archives of Internal Medicine August 1, 1979 139(8):944