RT Journal Article SR Electronic T1 Response Letter JF International Journal of Spine Surgery JO Int J Spine Surg FD International Society for the Advancement of Spine Surgery SP 164 OP 165 DO 10.14444/8361 VO 17 IS 1 A1 Andrew L. Freeman A1 Joan E. Bechtold A1 David W. Polly YR 2023 UL http://ijssurgery.com//content/17/1/164.abstract AB