1. Kochi University Department of Endocrinology, Metabolism, Nephrology and Rheumatology, Kochi Medical School Hospital, , 185-1 Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
2. Kochi University Department of Cardiovascular Surgery, Kochi Medical School Hospital, , 185-1 Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
3. Juntendo Koshigaya Hospital Department of Internal Medicine (Rheumatology), , 560 Fukuroyama, Koshigaya, Saitama 343-0032, Japan