RT Journal Article SR Electronic T1 Gastroenterology: ongoing challenges in diagnosis and therapy JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 241 OP 241 VO 59 IS 3 A2 John M. Bozdech A2 William D. Carey YR 1992 UL http://www.ccjm.org/content/59/3/241.1.abstract AB