1. Division of Molecular Pathology, Department of Pathological Sciences, Faculty of Medical Sciences, University of Fukui, Fukui 910-1193, Japan, Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Science, Niigata 951-8510, Japan, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan, and CREST of Japan Science and Technology Corporation, Saitama, Japan