“Efficacy of Magnesium Sulphate As a Coadyuvant in Postoperative Analgesia in Patients Undergoing Open Cholecystectomy”. Boletin Médico de Postgrado 35, no. 2 (March 17, 2020): 7–13. Accessed July 23, 2026. https://revistas2.uclave.org/index.php/bmp/article/view/2571.