Takao Saito, Emeritus Professor, Faculty of Medicine, Fukuoka UniversityJohn H. Stone, Massachusetts General Hospital Hitoshi Nakashima, Division of Nephrology & Rheumatology, Department of Internal Medicine, Fukuoka University Takako Saeki, Department of Internal Medicine, Nagaoka Red Cross Hospital Mitsuhiro Kawano, Division of Rheumatology, Department of Internal Medicine, Kanazawa University