LOW DOSE KETAMINE AT INDUCTION OF ANESTHESIA CAN HAVE OPIOID SPARING EFFECTS IN IMMEDIATE POST-OPERATIVE PERIOD FOLLOWING LAPAROSCOPIC CHOLECYSTECTOMY. RMSR [Internet]. 2025 Mar. 8 [cited 2025 Apr. 2];3(3):186-91. Available from: http://thermsr.com/index.php/Journal/article/view/724