Supplemental material, sj-pdf-1-cre-10.1177_02692155221086213 for Effectiveness, Compliance, and Safety of Dextrose Prolotherapy for Knee Osteoarthritis: A Meta-Analysis and Metaregression of Randomized Controlled Trials by Yi-Wen Chen, Yen-Nung Lin, Hung-Chou Chen, Tsan-Hon Liou, Chun-De Liao and Shih-Wei Huang in Clinical Rehabilitation