GBRNottingham University Hospitals NHS Trust (Centre for Spinal Studies and Surgery)United Kingdom1GBRNottingham University Hospitals NHS Trust (Nottingham NHS Treatment Centre)United Kingdom1GBRNottingham University Hospitals NHS Trust (Queen's Medical Centre)United Kingdom2GBRNottingham University Hospitals NHS Trust, City Hospital CampusUnited Kingdom2USANSLIJ/Hofstra North Shore-LIJ School of Medicine at Lenox Hill HospitalUnited States1AUSNSW Ambulance – Greater Sydney Area Helicopter Emergency Medical ServiceAustralia1AUSNSW Spine Specialists / Norwest Private Hospital and partner hospitalsAustralia1GBRNuffield Health Parkside / Chelsea and Westminster HospitalUnited Kingdom1GBRNuffield Orthopaedic Centre / Oxford University HospitalsUnited Kingdom2GBRNuffield Orthopaedic Centre, OxfordUnited Kingdom1GBRNuffield Orthopaedic Centre, Oxford University HospitalsUnited Kingdom1USANuvance Health Northern Dutchess Hospital / Zucker School of Medicine at Hofstra/NorthwellUnited States1USANuvance Health – Vassar Brothers Medical CenterUnited States1USANYC Health + Hospitals/Lincoln (Lincoln Medical and Mental Health Center)United States2USANYC Health + Hospitals/Lincoln (Lincoln Medical Center)United States1USANYU LangoneUnited States137