[1] Wayne State Univ, Sch Med, Dept Neurosurg, Detroit, MI USA
[2] Providence Med Ctr, Dept Neurosurg, Southfield, MI USA
[3] Childrens Hosp Michigan, Dept Neurosurg, Detroit, MI 48201 USA
[4] Childrens Hosp Michigan, Dept Radiol, Detroit, MI 48201 USA
[5] Childrens Hosp Michigan, Dept Pathol, Detroit, MI 48201 USA