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The Anal Fistula Plug versus the fistulotomy for the treatment of low perianal fistulas

To compare the Anal Fistula Plug with the fistulotomy in the treatment of low perianal fistula.

The Anal Fistula Plug versus the mucosal flap advancement
for the treatment of Anorectal Fistula

To compare the Anal Fistula Plug with the mucosal flap advancement in the treatment of high perianal fistula in terms of success rate, continence, postoperative pain and sick leave.