1. Department of Internal Medicine, Nagahama City Kohoku Hospital, Nagahama, Shiga, Japan
2. Department of General Medicine, Saga University Hospital, Saga, Japan
3. Department of Neuropathology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
4. Department of Nephrology, Shiroishi Kyoritsu Hospital, Saga, Japan
5. Department of General Medicine, Yuai-Kai Foundation & Oda Hospital, Kashima, Saga, Japan