AST-120 (spherical carbon adsorbent) in the treatment of perianal fistulae in mild-to-moderate Crohn's disease: FHAST-1, a phase 3, multicenter, placebo-controlled study. - Reinisch, W; Travis, S; Hanauer, S; Wang, H; Shara, N; Harris, MS (Inflammatory bowel diseases, 2014)