[1] Mahidol Univ, Siriraj Hosp, Fac Med, Dept Pathol,Div Neurosurg, Bangkok 10700, Thailand
[2] Mahidol Univ, Siriraj Hosp, Fac Med, Dept Radiol,Div Neurosurg, Bangkok 10700, Thailand
[3] Mahidol Univ, Siriraj Hosp, Fac Med, Dept Surg,Div Neurosurg, Bangkok 10700, Thailand
[4] Univ Calif San Francisco, Dept Pathol, Div Neuropathol, San Francisco, CA 94140 USA