MODIFICATION IN THE LEVELS OF ANALGESIC SUBSTANCES AFTER DRY NEEDLING TREATMENT IN CHRONIC LOW BACK PAIN. Cuestiones de Fisioterapia, [S. l.], v. 52, n. 2, p. 117–134, 2023. Disponível em: https://cuestionesdefisioterapia.com/index.php/es/article/view/30.. Acesso em: 27 sep. 2025.