Farr, J., Gomoll, A. H., Yanke, A. B., Strauss, E. J., Mowry, K. C., A. S. A. Study Group A Randomized Controlled Single-Blind Study Demonstrating Superiority of Amniotic Suspension Allograft Injection Over Hyaluronic Acid and Saline Control for Modification of Knee Osteoarthritis Symptoms. The Journal of Knee Surgery; 11: 1143-1154