EFFICACY OF ULTRASOUND-GUIDED INTRAMUSCULAR ELECTROSTIMULATION IN CONJUNCTION WITH MOTOR CONTROL EXERCISES IN NON-SPECIFIC CHRONIC LOW BACK PAIN: A PILOT RANDOMIZED CLINICAL TRIAL. CDF. 2021;50(3):183-202. Accessed September 13, 2025. https://cuestionesdefisioterapia.com/index.php/es/article/view/65