SANGHA, H. S.; TIWANA, H. S.; SCHMIDT , M. Impact of the COVID-19 pandemic on prior authorization delays for lumbar surgery: a retrospective cohort study . International Journal of Research in Orthopaedics, [S. l.], v. 12, n. 1, p. 56–60, 2025. DOI: 10.18203/issn.2455-4510.IntJResOrthop20254207. Disponível em: https://www.ijoro.org/index.php/ijoro/article/view/3975. Acesso em: 27 dec. 2025.