Sangha, Harneet S., Hardeep S. Tiwana, and Miguel Schmidt. “Impact of the COVID-19 Pandemic on Prior Authorization Delays for Lumbar Surgery: A Retrospective Cohort Study”. International Journal of Research in Orthopaedics 12, no. 1 (December 26, 2025): 56–60. Accessed December 27, 2025. https://www.ijoro.org/index.php/ijoro/article/view/3975.