1 Department of Nephrology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, 305-8575, Japan.
2 Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan.
3 Department of Pathology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.
4 Department of Nephrology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, 305-8575, Japan. k-yamaga@md.tsukuba.ac.jp.