1. Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan;
2. Department of Cognitive Behavioral Physiology, Chiba University Graduate School of Medicine, Chiba, Japan;
3. Research Center for Child Mental Development, Chiba University Graduate School of Medicine, Chiba, Japan;
4. Department of Pharmacotherapeutics, Showa Pharmaceutical University, Tokyo, Japan;
5. Department of Ultrastructural Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan