Yoshiaki Toyama, MD, PhD, ProfessorDepartment of Orthopaedic SurgeryKeio University, School of MedicineTokyo, Japan Atushi Miyawaki, MD, PhD, Lab HeadLaboratory for Cell Function DynamicsRIKEN, Center for Brain ScienceSaitama, Japan Masaya Nakamura, MD, PhD, ProfessorDepartment of Orthopaedic SurgeryKeio University, School of MedicineTokyo, Japan Masahiro Jinzaki, MD, PhD, Professor and ChairmanDepartment of Diagnostic RadiologyKeio University, School of Medicine Tokyo, Japan