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Rosa G, Lolli P, Piccinelli D, Mazzola F, Bonomo S. Fistula in ano: anatomoclinical aspects, surgical therapy and results in 844 patients. Tech Coloproctol. 2006 Oct;10(3):215-21

Sandiford N, Prussia PR, Chiappa A, Zbar AP. Synchronous mucinous adenocarcinoma of the rectosigmoid seeding onto a pre-existing anal fistula. Int Semin Surg Oncol. 2006 Sep 8;3:25.   

Gustafsson UM, Graf W. Randomized clinical trial of local gentamicin-collagen treatment in advancement flap repair for anal fistula. Br J Surg. 2006 Oct;93(10):1202-7.

Shelton AA, Welton ML. Transperineal repair of persistent rectovaginal fistulas using an acellular cadaveric dermal graft (AlloDerm). Dis Colon Rectum. 2006 Sep;49(9):1454-7.

Uribe N, Millan M, Minguez M, Ballester C, Asencio F, Sanchiz V, Esclapez P, Del Castillo JR. Clinical and manometric results of endorectal advancement flaps for complex anal fistula.
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Hama Y, Makita K, Yamana T, Dodanuki K. Mucinous adenocarcinoma arising from fistula in ano: MRI findings.
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Zmora O, Tulchinsky H, Gur E, Goldman G, Klausner JM, Rabau M. Gracilis muscle transposition for fistulas between the rectum and urethra or vagina. Dis Colon Rectum. 2006 Sep;49(9):1316-21.