[1] Kermanshah Univ Med Sci, Imam Reza Hosp, Dept Neurosurg, Kermanshah, Iran
[2] Shahid Beheshti Univ Med Sci, Dept Pediat, Tehran, Iran
[3] Shahid Beheshti Univ Med Sci, Loghman Hakim Hosp, Dept Neurosurg, Tehran, Iran
[4] Kermanshah Univ Med Sci, Imam Reza Hosp, Dept Anesthesiol, Kermanshah, Iran
[5] Kermanshah Univ Med Sci, Imam Reza Hosp, Kermanshah, Iran
[6] Kermanshah Univ Med Sci, Imam Reza Hosp, Clin Res Dev Ctr, Kermanshah, Iran
[7] Wayne State Univ, Sch Med, Detroit, MI USA