[1] Cent Texas Dept Vet Affairs VA Hlth Care Syst, Brain Imaging & Recovery Lab, Austin, TX USA
[2] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Dept Radiol, Boston, MA 02215 USA
[3] Univ Calif San Francisco, Ctr Imaging Neurodegenerat Dis, VA Med Ctr, San Francisco, CA 94143 USA
[4] Emory Univ, Sch Med, Emory Clin Neurosci Res Unit, Atlanta VA Med Ctr, Atlanta, GA USA
[5] Univ Calif Berkeley, Helen Wills Neurosci Inst, Henry H Wheeler Jr Brain Imaging Ctr, Berkeley, CA 94720 USA
[6] Univ Penn, Dept Neurol & Radiol, Ctr Funct Neuroimaging, Philadelphia, PA 19104 USA
[7] Wayne State Univ, Magnet Resonance Imaging Inst Biomed Res, Detroit, MI USA
[8] Mayo Clin, Rochester, MN USA
[9] CEA Saclay, F-91191 Gif Sur Yvette, France
[10] Univ Pittsburgh, PET Facil, Pittsburgh, PA USA
[11] San Francisco VA Med Ctr, Program Rehabil Neurosci, San Francisco, CA USA