
Keywords: Crohn's disease; Infliximab; Perianal fistula; Biologics; TNF-α; Tumor necrosis factor α; CDAI; Crohn's disease activity index; PDAI; Perianal Crohn's disease activity index; BMI; Body mass index; 5-ASA; Aminosalicylates; IQR; Interquartile range;