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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Best treatment of refractory peri-anal fistula in crohn's disease:-
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The correct answer is  Infliximab is effective in CD patients with refractory perianal and enterocutaneous fistulas, with 68% response rate (50% reduction in fistula drainage) and a 50% complete remission rate. Reinfusion, typically every 8 weeks, is necessary to continue therapeutic benefits in many patients.