[1] China Med Univ, Hosp 1, Dept Neurosurg, Shenyang 110001, Peoples R China
[2] China Med Univ, Dept Pediat, Shengjing Hosp, Shenyang 110001, Peoples R China
[3] China Med Univ, Dept Pediat, Shengjing Hosp, Shenyang, Peoples R China
[4] China Med Univ, Hosp 1, Dept Neurosurg, Shenyang, Peoples R China