Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Fukuda,"Oral spherical adsorptive carbon for the treatment of intractable anal fistulas in Crohn’s disease: A multicenter, randomized, double-blind, placebo-controlled trial",Am. J. Gastroenterol.,,,2008,103,,1721,https://cir.nii.ac.jp/crid/1370302866852332675,