1. Department of Orthopaedics, Division of Paediatric Orthopaedic Surgery, Alpert Medical School of Brown University, Providence, RI, USA
2. Department of Orthopaedics, Alpert Medical School of Brown University, Providence, RI, USA
3. Department of Orthopaedics, Division of Spine Surgery, Alpert Medical School of Brown University, Providence, RI, USA