Is surgery associated with improvement of sleep disturbance in patients with grade 2 lumbar spondylolisthesis? Insights from the Spine CORe™ analysis of QOD data. - Alan N; Dada A; Kumar J; Le VP; Turner JD; Uribe JS; Asher AL; Kim PK; Fu KG; Virk MS; Shaffrey CI; Gottfried ON; et al. (Neurosurgical focus, 2026)