Arunakul, Preeyaphan, and Thanachit Ruangprach. “Efficacy and Safety of Intrathecal Morphine in Patients Underwent Foot and Ankle Surgery; A Retrospective Study”. Asian Medical Journal and Alternative Medicine 22, no. - (August 1, 2022): S123. Accessed November 27, 2024. https://asianmedjam.com/index.php/amjam/article/view/1302.