AbdelQadir YH, Nabhan AE, Abdelghany EA, Mohamed AG, Tokhey ASE, Elmegeed AA, Nourelden AZ, Ragab KM. Efficacy and safety of intrathecal morphine in total knee arthroplasty: A systematic review and meta-analysis. J of Opioid Management [Internet]. 2021 Sep. 1 [cited 2024 Apr. 29];17(5):405-16. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/3079