1. Department of Rheumatology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan
2. Department of Pulmonary Medicine, National Hospital Organization Hamada Medical Center, Hamada, Shimane, Japan
3. Department of Pathology, National Hospital Organization Hamada Medical Center, Hamada, Shimane, Japan
4. Department of Orthopedics, National Hospital Organization Hamada Medical Center, Hamada, Shimane, Japan