EFFICACY OF BILATERAL ULTRASOUND GUIDED ERECTOR SPINAE PLANE BLOCK ON POSTOPERATIVE PAIN IN LUMBAR SPINE SURGERIES; A DOUBLE-BLIND RANDOMISED PLACEBO CONTROL TRIAL . CDF. 2025;54(2):1026-1041. Accessed January 30, 2026. https://cuestionesdefisioterapia.com/index.php/es/article/view/815