1. First Department of Internal Medicine (A.N.-O., M.N., Y.O., H.S.), Nagoya University School of Medicine, Nagoya 466-8550;
2. Department of Clinical Laboratory Medicine (Y.I.), Nagoya University School of Medicine, Nagoya 466-8550;
3. Department of Cell Regulation, Saitama University (K.I.), Saitama 338-0825, Japan