1. Faculty of Engineering, Yamaguchi University Graduate School of Sciences and Technology for Innovation, 2-16-1 Tokiwadai, Ube City, Yamaguchi Prefecture 755-0097, Japan
2. Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube City, Yamaguchi Prefecture 755-8505, Japan