Evidence outside the box: Minimally invasive treatment for anal fistula The Use of Platelet Rich Fibrin Plugs in the Treatment of Perianal Fistula: Traditional Curettage vs. Debridement with a Graduated Set of Cylindrical Curettes Anal Fistula Prof. Dr. Mustafa Ate Frontiers Modified Plug Repair with Limited Sphincter Sparing Fistulectomy in the Treatment of Complex Anal Fistulas Anal Fistula Surgeons 101 Successful closure of gastrocutaneous fistulas using the Surgisis^{< sup> anal fistula plug The Annals of The Royal College of Surgeons of England}