[1] Department of Neurosurgery,
[2] Sung Kyun Kwan University College of Medicine,undefined
[3] Samsung Medical Center,undefined
[4] 50 Ilwon-dong,undefined
[5] Kangnam-gu,undefined
[6] Seoul 135-710,undefined
[7] Korea,undefined
[8] Division of Pediatric Neurosurgery,undefined
[9] Seoul National University Children's Hospital,undefined
[10] 28 Yongon-dong,undefined
[11] Chongno-gu,undefined
[12] Seoul 110-744,undefined
[13] Korea e-mail: kyuhang@plaza.snu.ac.kr Tel.: +82-2-760-3489 Fax: +82-2-747-5130,undefined
[14] Department of Pediatrics,undefined
[15] Seoul National University Children's Hospital,undefined
[16] 28 Yongon-dong,undefined
[17] Chongno-gu,undefined
[18] Seoul 110-744,undefined
[19] Korea,undefined
[20] Department of Therapeutic Radiology,undefined
[21] Seoul National University Hospital,undefined
[22] Seoul,undefined
[23] Korea,undefined