1. Department of Rheumatology, Faculty of Medicine, Saga University, Saga, Japan
2. Department of Rheumatology and Clinical Immunology, Jichi Medical University, Shimotsuke, Japan
3. Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
4. Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
5. Division of Rheumatology, Japanese Red Cross Fukuoka Hospital, Fukuoka, Japan
6. Center for Rheumatic Diseases, Iizuka Hospital, Iizuka, Japan
7. Division of Internal Medicine, Saiseikai Karatsu Hospital, Karatsu, Japan
8. Suigo-en Kohokai Group Medical Corporation, Fukuoka, Japan