Inclusion Criteria:  Diagnosed with CD.  Presence of CPF(s), defined as >=1 of the following criteria:  High intersphincteric, high transsphincteric, extrasphincteric, or suprasphincteric location; >=2 external openings; Associated collections. Attending routine gastroenterology appointments at the participating hospitals.  Exclusion Criteria:  Diagnosed with ulcerative colitis or indeterminate inflammatory bowel disease (IBD). With non-complex fistulas or with fistulas types other than perianal (example, rectovaginal).