I have never seen a discussion before on this type of treatment for Perianal Fistulas. " A Lump of Coal for Perianal Fistulas"
http://onlinelibrary.wiley.com/stor...1A48570A60EB23.f03t01?v=1&t=hz65afy1&e2dd52fb
http://onlinelibrary.wiley.com/stor...1A48570A60EB23.f03t01?v=1&t=hz65afy1&e2dd52fb