“POSTOPERATIVE ANALGESIC EFFICACY OF EPIDURAL MORPHINE IN PATIENTS UNDERGOING CESAREAN SECTION, HOSPITAL ALFREDO G. PAULSON. NOVEMBER AND DECEMBER 2019”. Actas Médicas (Ecuador) 30, no. 2 (December 31, 2020): 77–83. Accessed April 28, 2026. https://actasmedicas.ec/index.php/am/article/view/40.