Koushik Subramanyam, et al. “Single Versus Multi-Dose Intra-Articular Injection of Platelet Rich Plasma in Early Stages of Osteoarthritis of the Knee: A Single-Blind, Randomized, Superiority Trial”. Archives of Rheumatology, vol. 36, no. 3, Sept. 2021, pp. 326-34, doi:10.46497/ArchRheumatol.2021.8408.