Extended Asymmetrical Pedicle Subtraction Osteotomy for Adult Spinal Deformity: 2-Dimensional Operative Video. Issue 2 (1st February 2019) - Buell, Thomas J; Buchholz, Avery L; Quinn, John C; Mullin, Jeffrey P; Garces, Juanita; Mazur, Marcus D; Shaffrey, Mark E; Yen, Chun-Po; Shaffrey, Christopher I; Smith, Justin S