1. Health Services Center, National Graduate Institute For Policy Studies, Tokyo, Japan
2. Department of Medicine, Institute of Clinical Endocrinology, Tokyo Women’s Medical University, School of Medicine, Tokyo, Japan
3. Ghrelin Research Project, Kyoto University School of Medicine, Kyoto, Japan
4. Department of Physiology, Nippon Medical School, Tokyo, Japan
5. National Cardiovascular Center Research Institute, Osaka, Japan