“RETRACTED: Intravenous versus perineural dexmedetomidine in prolongation of analgesia with regional anesthesia: a meta-analysis and systematic review” (2021) Pain medicine, 6(2), pp. 10–28. Available at: https://painmedicine.org.ua/index.php/pnmdcn/article/view/255 (Accessed: 10 July 2026).