1. Department of Internal Medicine and Rheumatology; Clinical Research Institute; National Hospital Organization; Kyushu Medical Center; Fukuoka Japan
2. Department of Geriatric Medicine; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
3. Department of Rheumatology; National Hospital Organization; Beppu Medical Center; Oita Japan
4. Department of Rheumatology; National Hospital Organization; Sagamihara National Hospital; Sagamihara Japan
5. Department of Rheumatology; Clinical Research Center for Allergy and Rheumatology; National Hospital Organization; Sagamihara National Hospital; Sagamihara Japan
6. Department of Medicine and Bioregulatory Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan