RT Journal Article SR Electronic T1 Lecture Notes on Gastroenterology by Elwyn Elias and Clifford Hawkins JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 118 OP 119 VO 53 IS 1 A1 Jose R. Mendez YR 1986 UL http://www.ccjm.org/content/53/1/118.2.abstract AB