1. Department of Orthopaedic Surgery, St Luke’s University Health Network, Fountain Hill, PA, USA
2. Rome Orthopaedic Center, Rome, GA, USA
3. Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA, USA
4. Department of Orthopaedic Surgery, Scripps Clinic, La Jolla, CA, USA