[1] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, W Harry Feinstone Dept Mol Microbiol & Immunol, Baltimore, MD 21205 USA
[2] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Biostat, Baltimore, MD 21205 USA
[3] Johns Hopkins Sch Med, Dept Neurol, Baltimore, MD 21205 USA
[4] Johns Hopkins Univ, Dept Pharmacol & Mol Sci, Baltimore, MD 21205 USA
[5] Univ Pittsburgh, Pittsburgh Inst Neurodegenerat Dis, Dept Neurol, Pittsburgh, PA 15260 USA
[6] Johns Hopkins Univ, Dept Biol, Baltimore, MD 21218 USA
[7] Johns Hopkins Univ, Integrated Imaging Ctr, Baltimore, MD 21218 USA
[8] Univ Missouri, Anim Sci Unit, Columbia, MO 65211 USA
[9] Max Planck Inst Expt Med, Dept Neurogenet, D-37075 Gottingen, Germany
[10] Yale Univ, Dept Internal Med, New Haven, CT 06520 USA