TY - JOUR T1 - Comparison between intravenous and intrathecal clonidine for postoperative analgesia of patients submitted to laparoscopic cholecystectomy: randomized clinical trial JO - Brazilian Journal of Anesthesiology A1 - Silva, Christiane Rodrigues da A1 - Oliveira, Cinthya Iamile Frithz Brandão de A1 - Nunes, Juscimar Carneiro SN - 2352-2291 UL - 10.1016/j.bjane.2021.03.029 VL - 72 Y1 - 2022 PB - Brasil ER -