Curcumin maintenance therapy for ulcerative colitis: randomized, multicenter, double-blind, placebo-controlled trial - Hanai, H; Iida, T; Takeuchi, K; Watanabe, F; Maruyama, Y; Andoh, A; Tsujikawa, T; Fujiyama, Y; Mitsuyama, K; Sata, M; Yamada, M; Iwaoka, Y; Kanke, K; Hiraishi, H; Hirayama, K; Arai, H; Yoshii, S; Uchijima, M; Nagata, T; Koide, Y (Clin Gastroenterol Hepatol, 2006)