Exploratory Clinical Study to Evaluate the Efficacy and Safety of Sulfasalazine for Immune Checkpoint Inhibitor (ICI)-Induced Colitis. - Kobayashi M; Yamada T; Ueyama S; Yamamoto Y; Sugaya A; Hiroshima Y; Mamiya T; Hattori J; Akiyama S; Mathis BJ; Tsuchiya K (JGH open : an open access journal of gastroenterology and hepatology, 2026)