[1] Univ Calif Los Angeles, Alzheimers Dis Res Ctr, Dept Neurol, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Los Angeles, CA USA
[3] Natl Inst Neurol & Neurosurg, Expt Psychol Lab, Mexico City, DF, Mexico
[4] Univ So Calif, Keck Sch Med, Rancho Los Amigos Natl Rehabilitat Ctr, Dept Neurol, Downey, CA USA
[5] Univ Calif Los Angeles, Ahmanson Lovelace Brain Mapping Ctr, Los Angeles, CA USA
[6] Univ Calif Los Angeles, Med Ctr, Neuropsychiat Res Memory Clin, Sylmar, CA USA
[7] VA Greater Los Angeles Hlthcare Syst, Dept Psychiat, Los Angeles, CA USA