1. Division of Familial Cancer Research, National Cancer Center Research Institute, Tokyo 104-0045, Japan
2. Division of Diabetes, Endocrinology and Metabolism, Department of Internal Medicine, Shinshu University Hospital, Matsumoto 390-8621, Japan
3. Department of Laboratory Medicine, Shinshu University School of Medicine, Matsumoto 390-8621, Japan
4. Department of Medical Genetics, Shinshu University School of Medicine, Matsumoto 390-8621, Japan