[1] Tottori Univ, Fac Med, Inst Neurol Sci, Div Child Neurol, Yonago, Tottori 6838504, Japan
[2] Tottori Univ, Fac Med, Dept Neuropsychiat, Yonago, Tottori 6838504, Japan
[3] Tottori Prefectural Kaike Rehabil Ctr Disabled Ch, Dept Paediat, Yonago, Tottori, Japan