1. Department of Clinical Immunology and Rheumatology/Infectious Disease, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
2. Clinical Education Center, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
3. Department of Internal Medicine, Kyushu University Beppu Hospital, 4546 Tsurumibaru, Beppu, Oita 874-0838, Japan