[1] Juntendo Univ, Fac Hlth Sci & Nursing, Dept Basic Educ, 3-7-33 Omiya, Mishima, Shizuoka 4118787, Japan
[2] Med Corp SHOWAKAI, Kitahachiouji Clin, Hachioji, Tokyo, Japan
[3] Saiyu Soka Hosp, Dept Nephrol, Internal Med, Soka, Saitama, Japan
[4] Med Corp SHOWAKAI, Nerima Takanodai Clin, Nerima Ku, Tokyo, Japan
[5] Med Corp SHOWAKAI, Anezaki Clin, Ichihara, Chiba, Japan
[6] Med Corp SHOWAKAI, Ikegami Gen Hosp, Dept Nephrol, Ohta Ku, Tokyo, Japan
[7] SHOWAKAI, Medical Corp, Shinjuku Ku, Tokyo, Japan