I have a non-healing wound on my left ankle. I've had it for 3 yrs. I've had it grafted 6 X. I've had bypass surgery by a vascular dr for 100% blockage. The wound keeps getting larger. It's also very painful. I just want it to HEAL. I also have rheumatoid arthritis, which compromises my immune system. Does anyone have any suggestions? Doctors, Wound Care Ctrs.?