Dr. Wall proposed “PRP” to help a stubborn tendon that just would not recover after my left knee replacement. It was a simple procedure where a special technician draws your own blood and runs it through a special machine that creates a “Plasma” that is then injected into the envelope of the tendon. With just “Taking it easy” on the leg for about six weeks the tendon finally healed perfectly and the leg is completely normal. I totally recommend this procedure.