1 Adult and Pediatric Spine Surgeon, Norton Leatherman Spine Center, Associate Professor, Department of Orthopaedic Surgery, University of Louisville, Louisville, KY, USA. Electronic address: chcraw01@gmail.com.
2 Department of Orthopaedics and Rehabilitation, University of Rochester, Rochester, NY, USA.
3 Department of Orthopedic Surgery, University of Kansas School of Medicine, Kansas City, KS, USA.