1. First Department of Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
2. Division of Blood Purification Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan
3. Hamamatsu University School of Medicine, Hamamatsu Department of Internal Medicine Fujinomiya City General Hospital, Fujinomiya Shizuoka, Japan