[1] Northwestern Univ, Feinberg Sch Med, Dept Biochem & Mol Genet, Chicago, IL 60611 USA
[2] Northwestern Univ, Feinberg Sch Med, Dept Neurol Surg, Chicago, IL 60611 USA
[3] Northwestern Univ, Dept Pathol, Feinberg Sch Med, Chicago, IL 60611 USA
[4] Northwestern Univ, Dept Med, Feinberg Sch Med, Chicago, IL 60611 USA
[5] Northwestern Univ, Northwestern Prote, Chicago, IL 60611 USA
[6] Northwestern Univ, Feinberg Sch Med, Dept Pediat Hematol Oncol & Stem Cell Transplanta, Chicago, IL 60611 USA
[7] Ann & Robert H Lurie Childrens Hosp Chicago, Dept Surg, Div Pediat Neurosurg, Chicago, IL 60611 USA
[8] Northwestern Univ, Dept Chem, Chicago, IL 60611 USA