Sangha, H.S., Tiwana, H.S. and Schmidt , M. 2025. Impact of the COVID-19 pandemic on prior authorization delays for lumbar surgery: a retrospective cohort study . International Journal of Research in Orthopaedics. 12, 1 (Dec. 2025), 56–60. DOI:https://doi.org/10.18203/issn.2455-4510.IntJResOrthop20254207.