title: Complex gastrointestinal fistulae.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007412:Intestinal Fistula / Q000150:complications / Q000209:etiology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications