[1] Funabashi Orthopaedic Hospital,Sports Medicine and Joint Center
[2] Chiba University,Musculoskeletal Pain and Disease, Center for Preventive Medical Sciences, School of Medicine
[3] Chiba University,Department of Orthopaedic Surgery, School of Medicine
[4] Funabashi Orthopedic Hospital,Joint Replacement Center
[5] Chiba University Hospital,Biostatistics Section, Clinical Research Center