Evaluation of Local Co-administration of Autologous ADIpose Derived Stromal Vascular Fraction With Microfat for Refractory Perianal CROHN's Fistulas.

local co-administration of autologous ADIpose derived stromal vascular fraction and microfat for refractory perianal CROHN's fistulas Each batch of the final product is composed of one 5 mL syringes containing 25,9 +/- 10,7 millions viable cells. Each syringe will be obstructed with a sterile stopper and packaged in an external packaging.

local co-administration of placebo The study placebo will consist of a saline solution for intralesional administration and will follow the same administration schema described for the SFV