1. Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
2. Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
3. Center for Cause of Death Investigation, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
4. Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
5. Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan. aishizu@med.hokudai.ac.jp