Ma Wealthy in Development Factor; HA: Hyaluronic Acid; IAIs: Intra Articular Injections; OA: Osteoarthritis; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; PDGF: Platelet Derived Growth Aspect; IGF: Insulin-like Growth Element; CBC: Comprehensive Blood Count; CRP: C-reactive protein; ESR: erythrocyte sedimentation price; AP: anteroposterior; VAS: Visual Analogue Scale; ADL: Activities of Everyday Life Acknowledgments The authors would like to thank their dear colleagues from physical medicine and rehabilitation research center and clinical analysis developmental Center of Shahid Moddares Hospital, Maryam Karimian, Javad Vafipoor, Leila Salehifard, Mehrnoush Moeinfard, and Dr. Pegah Yavari for their cooperation in data gathering. This article has been extracted in the thesis written by Dr. ParsaGhazihosseini in School of Medicine, Shahid Beheshti University of Medical Sciences. (registration no: 391). Authors’ contributions SR: Principal Investigator, study style, Fund acquisition, drafting and reviewing of manuscript, PH: Information collection, draft, and revision of manuscript, MB: Study design and style and reviewing of manuscript, RR: Evaluation of manuscript, MF: Assessment of manuscript, AA: Information collection, evaluation, and submitting of manuscript, MD: Overview of manuscript. All authors have read and authorized the final manuscript. Funding The source of funding for this trial was obtained from Vice chancellor for analysis, Shahid Beheshti University of Medical Sciences. The funding body played no role within the design with the study and collection, analysis, and interpretation of information and in writing the manuscript. Availability of information and supplies The datasets made use of and/or analyzed during the present study are offered in the corresponding author on affordable COX-1 Inhibitor supplier request. Ethics approval and consent to participate This study has been approved by Shahid Beheshti University of Medical Sciences’ ethical neighborhood together with the following code: IR.SBMU.MSP.REC.1396.230 and written consent was acquired from candidates and they had been permitted to leave the study any time that theyOne of your limitations of this study is the lack of a placebo group. Also, as a result of their nature, some aspects in the study had been also not blinded; PRP and PRGF necessary blood samples from the candidates also as a certain injection system. Taking blood samples from HA and ozone candidates would not have been ethically authorized. All other aspects in the study like information analysis and comply with up remained blinded. The concurrent comparison of 4 distinct novel treatment approaches for knee OA could be regarded as as certainly one of the strengths of this study. For the greatest of our information, at the time of this research, no study has compared all 4 of those at the very same time. The longRaeissadat et al. BMC Musculoskeletal Disorders(2021) 22:Web page 13 ofwanted. The authors of the present study are committed to CONSORT recommendations in reporting the outcomes. 15. Consent for publication Not applicable. Author specifics 1 Clinical Development Study Center of Shahid Modarres Hospital, College of Medicine, Shahid Beheshti University of Healthcare Sciences, Tehran, Iran. 2 Physical Medicine and Rehabilitation Analysis Center, Shahid Beheshti University of Health-related Sciences, Tehran, Iran. 3Shohada-e-Tajrish Hospital, School of Medicine, Shahid Beheshti University of Health-related Sciences, Tehran, Iran. 4Department of Neurobiology, Care GSK-3β Inhibitor Compound Sciences and Society, Karolinska Institute, Stockholm, Sweden. 5Critical Care Fellowship.