1. Department of Orthopaedic Surgery, University of Miami-Jackson Memorial Health System, Miami, Florida, USA.
2. Department of Anesthesiology, Rutgers University Newark Health System, Newark, New Jersey, USA.
3. Department of Orthopaedic Surgery, The George Washington University Hospital, Washington, DC, USA.
4. The George Washington University School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA.
5. Department of Pediatric Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA.
6. Washington Spine and Scoliosis Institute, OrthoBethesda, Bethesda, Maryland, USA.
7. Department of Spine Surgery, Virginia Hospital Center, Arlington, Virginia, USA.