1. Department of Metabolic Diseases (H.W., T.Y., J.K., S.K., Y.I., Y.H., S.U., A.T., S.T., T.K.), Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
2. Core Research for Evolutional Science and Technology (CREST) of Japan Science and Technology Corporation (JST) (H.W., T.Y., T.K.), Kawaguchi 332-0012, Japan