RT Journal Article SR Electronic T1 Gastroenterology and Hepatology: Clinical Medicine Series JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 231 OP 231 DO 10.3122/15572625-13-3-231a VO 13 IS 3 A1 David R. Garr YR 2000 UL http://www.jabfm.org/content/13/3/231.1.abstract AB