^*Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN

^†Royal College of Surgeons in Ireland, St. Stephen’s Green, Dublin, Ireland

^‡Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, MD

^§Department of Surgery, School of Medicine, Trinity College Dublin

^∥Spine Service, Department of Trauma & Orthopaedic Surgery, Tallaght University Hospital

^¶National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland

The authors declare no conflict of interest.

Reprints: Daniel P. Ahern, MCh, MRCSI, Department of Surgery, School of Medicine, Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, D02 R590 Ireland(e-mail: [email protected]).