**Author details**

Toshio Munesue, Kazumi Ashimura, Mitsuru Kikuchi, Shigeru Yokoyama, Manabu Oi and Haruhiro Higashida *Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan* 

Hideo Nakatani *Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa university, Kanazawa, Japan* 

Yoshio Minabe *Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan* 
