A randomized, double-blind, placebo-controlled trial of the effects of rofecoxib, a selective cyclooxygenase-2 inhibitor, on rectal polyps in familial adenomatous polyposis patients - Higuchi, T; Iwama, T; Yoshinaga, K; Toyooka, M; Taketo, M M; Sugihara, K (Clin Cancer Res, 2003)