[1] Massachusetts Gen Hosp, Dept Neurol, Neuroprotect Res Lab, Charlestown, MA 02129 USA
[2] Massachusetts Gen Hosp, Dept Radiol, Neuroprotect Res Lab, Charlestown, MA 02129 USA
[3] Harvard Univ, Sch Med, Program Neurosci, Charlestown, MA 02129 USA
[4] Tufts Univ, Sch Med, New England Eye Ctr, Vis Res Labs, Boston, MA 02111 USA
[5] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Stroke & Neurovasc Regulat Lab, Charlestown, MA USA
[6] Univ Pittsburgh, Dept Neurol Surg, Brain Trauma Res Ctr, Pittsburgh, PA 15260 USA