Author Correction: Sagittal age-adjusted score (SAAS) for adult spinal deformity (ASD) more effectively predicts surgical outcomes and proximal junctional kyphosis than previous classifications. - Lafage R; Smith JS; Elysee J; Passias P; Bess S; Klineberg E; Kim HJ; Shaffrey C; Burton D; Hostin R; Mundis G; Ames C; et al. (Spine deformity, 2023)