1. Third Department of Internal Medicine, Showa University School of Medicine, Tokyo, Japan.
2. Department of Physiological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.
3. Department of Molecular Genetics, Laboratory of Racing Chemistry, Tochigi-ken, Japan.
4. Division of Endocrinology and Metabolism, Showa University Fujigaoka Hospital, Yokohama, Japan.