OBSERVATIONAL EVALUATION OF THE EFFECTIVENESS OF CAUDAL EPIDURAL STEROID INJECTION IN THE MANAGEMENT OF PERSISTENT LOWER BACK PAIN. International Research Journal of Pharmacy, [S. l.], v. 9, n. 2, p. 95–99, 2018. Disponível em: https://irjponline.org/index.php/irjp/article/view/762. Acesso em: 25 oct. 2026.