1. Laboratory for Developmental Neurobiology, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
2. Division of Neuronal Network, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
3. Calcium Oscillation Project, ICORP-SORST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan.
4. Department of Physiology, Juntendo University, Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
5. Laboratory of Functional Genomics, Department of Medical Genome Science, Graduate School of Frontier Science, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.