Perianal Fistulizing Crohn's Disease-Associated Anorectal and Fistula Cancers: Systematic Review and Expert Consensus. - Wong SY; Rowan C; Brockmans ED; Law CCY; Giselbrecht E; Ang C; Khaitov S; Sachar D; Polydorides AD; Winata LS; Verstockt B; Spinelli A; et al. (Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association, 2025)