The article "Ulcerative Colitis: Diagnosis and Treatment," (November 1, 2007, page 1323) contained an error in Figure 1 on page 1327. In the far left branch of this algorithm, an arrow was inadvertently inserted from "Rectal 5-ASA maintenance" to "Oral steroids." The corrected algorithm is reprinted here and has been corrected online.
Treatment of Ulcerative Colitis

Figure 1. Algorithm for the treatment of ulcerative colitis. (5 ASA = 5-aminosalicylic acid.)
