1. Laboratory of Endocrine Cell Biology (J.H.H., D.W.K., J.M.S., H.K., J.H.S., E.S.H., K.C.P., E.S.H., K.C.P., H.K.C., M.S.), National Research Laboratory Program, Daejeon 301-721, Korea
2. Department of Internal Medicine, Department of Pathology (J.M.K.), Chungnam National University School of Medicine, Daejeon 301-721, Korea
3. Korea Research Institute of Bioscience and Biotechnology (T.-H.L., D.-Y. Y.), Yusong, Daejeon 305-600, Korea