1. Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8641, Japan, 2Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan, 3Department of Anesthesiology, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8641, Japan, and 4Department of Neuropsychiatry, University of Toyama, Toyama 930-0152, Japan