The effects of injecting intra-articular platelet-rich plasma or prolotherapy on pain score and function in knee osteoarthritis The effects of injecting intra-articular platelet-rich plasma or prolotherapy on pain score and… dovepress.com Intra-articular platelet-rich plasma (PRP) injections for treating knee pain associated with osteoarthritis of the knee in the Japanese population: a phase I and IIa clinical trial ncbi.nlm.nih.gov Conservative management of MRI-confirmed knee osteoarthritis with instrument-assisted soft-tissue mobilization, joint manipulation, and platelet-rich plasma ncbi.nlm.nih.gov