[1
]Department of Rheumatology, Niigata Rheumatic Center, Japan
[2
]Division of Clinical Nephrology and Rheumatology Niigata University Graduate School
of Medical and Dental Sciences, Japan
[3
]Department of Orthopaedic Surgery, Showa University School of Medicine, Japan
[4
]Department of Orthopaedic Surgery, Nihon University School of Medicine, Japan