1. Research Team for Functional Genomics and Research Team for Molecular Biomarkers, Tokyo Metropolitan Institute of Gerontology, Foundation for Research on Aging and Promotion of Human Welfare, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan, Sphingolipid Expression Laboratory, The Institute of Physical and Chemical Research, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan, and Molecular Neuroscience, Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University,...