1. Graduate School of Allied Health Sciences, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan
2. Department of Nephrology, Sendai Shakaihoken Hospital, Tsutsumimachi, 3-16-1, Aoba-ku, Sendai 981-8501, Japan
3. Department of Laboratory Medicine, Asahikawa Medical College, Midorigaoka-higashi 2-1-1-1, Asahikawa, Hokkaido 078-8510, Japan