TY - JOUR T1 - CORRECTION JF - Gut JO - Gut SP - 1657 LP - 1657 DO - 10.1136/gut.52.11.1657-a VL - 52 IS - 11 A2 - , Y1 - 2003/11/01 UR - http://gut.bmj.com/content/52/11/1657.2.abstract N2 - In the paper by Nikolaus et al(Gut 2002;52:1286–90, “Interferon ß-1a in ulcerative colitis: a placebo controlled, randomised, dose escalating … ER -