POSTOPERATIVE ANALGESIC EFFICACY OF EPIDURAL MORPHINE IN PATIENTS UNDERGOING CESAREAN SECTION, HOSPITAL ALFREDO G. PAULSON. NOVEMBER AND DECEMBER 2019. Actas Médicas (Ecuador), [S. l.], v. 30, n. 2, p. 77–83, 2020. DOI: 10.61284/40. Disponível em: https://actasmedicas.ec/index.php/am/article/view/40.. Acesso em: 28 apr. 2026.