1. Department of Traumatology, Fukushima Medical University, Trauma and Reconstruction Center, Shin-Yurigaoka General Hospital, Kawasaki, Japan
2. Trauma Reconstruction Center, University of Occupational and Environmental Health, Kitakyushu, Japan
3. Department of Orthopaedic Surgery, Harima-Himeji General Medical Center, Himeji, Japan
4. Department of Orthopaedic Surgery, Orthopaedic Trauma Institute, University of California, San Francisco, School of Medicine, Zuckerberg San Francisco General Hospital, San Francisco, CA