30- and 90-day readmission after elective spine surgery—does postoperative inpatient medical optimization affect readmission rates: a retrospective cross-sectional study

Emily I. Wynkoop, Megan L. Reitenbach, Kyle M. Behrens, Mina Tanios, Anthony Kouri, Sadik Khuder, Ian Risser, Hossein Elgafy