1 Shiley Center for Orthopaedic Research and Education, Scripps Clinic, La Jolla, California; Department of Orthopaedic Surgery, Balikesir University, Balikesir, Turkey.
2 Shiley Center for Orthopaedic Research and Education, Scripps Clinic, La Jolla, California; Department of Orthopaedic Surgery, Federal University of São Paulo, Brazil.
3 Department of Orthopaedic Surgery, University of California, San Diego School of Medicine, La Jolla, California; Department of Orthopaedic Surgery, Scripps Clinic, La Jolla, California.