1. Ghrelin Research Project (H.I., Y.L., H.A., M.B., T.A.), Kyoto University Hospital, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan;
2. National Cardiovascular Center Research Institute (H.H., K.K.), Osaka 565-8565, Japan
3. Translational Research Center, and Department of Medicine and Clinical Science, Endocrinology, and Metabolism (N.K., G.Y., K.H., K.N.), Kyoto University Hospital, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan;