1. Second Division (K.I., Y.O., M.Y., F.M., C.H., K.Y., H.N.), Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan;
2. Department of Medicine, and Department of Laboratory Medicine (K.I., M.M.), Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan;
3. Department of Neurosurgery (S.N.), University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan;
4. Department of Hypothalamic and Pituitary Surgery (S.Y.), Endocrine Center, Toranomon Hospital, Tokyo 105-8470, Japan;
5. Department of Pathology (H S.), Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan