RT Journal Article SR Electronic T1 Sulphasalazine in ulcerative colitis. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1582 OP 1582 DO 10.1136/gut.33.11.1582-a VO 33 IS 11 A1 A S Michalowski YR 1992 UL http://gut.bmj.com/content/33/11/1582.2.abstract AB