1. Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Division of Internal Medicine, Fukuoka Dental College, Fukuoka, Japan
3. Fukuoka Renal Clinic, Fukuoka, Japan
4. Integrated Therapy for Chronic Kidney Disease, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan