I also use the services of regenexx. I found them to be ethical and helpful with my health issues. I used PRP on my back 3 years ago and it saved me from an operation. I also did the stem cells on the left knee and have followed it up with PRP injections yearly. Yes, it costs out of pocket. Yes, i avoid surgery and the pain that follows. My right knee was TKR and 5 years later it is now lose and painful for 5 years. Water therapy caused my knee to swell. Swelling never went down after the operation. PT was living hell. So, to those who had a good experience, i am happy for you. I will not give another surgeon the chance to ruin the knee i garden on and bike on an golf on. Yes, there is some pain but i take no pills. Just ice, baby.