RT Journal Article SR Electronic T1 Which Operation for Chronic Duodenal Ulcer? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 3 OP 5 VO 21 IS 1 A1 Stanley O. Hoerr A1 George Crile, Jr. YR 1954 UL http://www.ccjm.org/content/21/1/3.abstract AB