1. Department of Orthopaedic Surgery, Nara Medical University, 840, Shijo-cho, Kashihara 634-8521, Japan
2. First Department of Orthopaedics, School of Medicine, National and Kapodistrian University of Athens, 41 Ventouri Street, Holargos, 15562 Athens, Greece
3. Department of Diagnostic Pathology, Nara Medical University, 840, Shijo-cho, Kashihara 634-8521, Japan
4. Department of Pathology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
5. Department of Rehabilitation Medicine, Nara Medical University, 840, Shijo-cho, Kashihara 634-8521, Japan
6. Department of Rehabilitation Medicine, Wakayama Professional University of Rehabilitation, 3-1, Minamoto-cho, Wakayama 640-8222, Japan
7. Department of Orthopaedic Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Rizzoli Orthopaedic Institute, Via Pupilli 1, 40136 Bologna, Italy