EFFICACY OF BILATERAL ULTRASOUND GUIDED ERECTOR SPINAE PLANE BLOCK ON POSTOPERATIVE PAIN IN LUMBAR SPINE SURGERIES; A DOUBLE-BLIND RANDOMISED PLACEBO CONTROL TRIAL . CDF [Internet]. 2025 Jan. 10 [cited 2025 Sep. 18];54(2):1026-41. Available from: https://cuestionesdefisioterapia.com/index.php/es/article/view/815