Daffner SD, Bunch JT, Burton DC, Milam Iv RA, Park DK, Strenge KB, Whang PG, An HS, Kopjar B. Better Functional Recovery After Single-Level Compared With Two-Level Posterolateral Lumbar Fusion. Cureus. 2022 Mar 9;14(3):e23010. doi: 10.7759/cureus.23010. e