A systematic review on the high variability in study design and outcome reporting in randomized controlled trials examining intra-articular platelet-rich plasma injection for knee... oleh Alexander Beletsky, Amar S. Vadhera, Eric J. Strauss, Rahul Sachadev, Harsh Singh, Safa Gursoy, Suhas P. Dasari, Mario Hevesi, Brian J. Cole, Nikhil N. Verma, Jorge Chahla