[1] Baylor Coll Med, Dept Neurol, Houston, TX 77030 USA
[2] Lutheran Med Off, Ft Wayne, IN USA
[3] Univ Arkansas Med Sci, Coll Med, Dept Geriatr, Little Rock, AR 72205 USA
[4] Univ Kansas, Med Ctr, Dept Neurol, Kansas City, KS 66103 USA
[5] Oregon Hlth & Sci Univ, Dept Neurol, Portland, OR 97201 USA
[6] Vet Affairs Med Ctr, Portland, OR USA
[7] Duke Univ, Durham, NC 27706 USA
[8] Mt Sinai Sch Med, Bronx, NY USA
[9] VA Med Ctr, Bronx, NY USA
[10] Univ Calif San Diego, Dept Neurosci, San Diego, CA 92103 USA
[11] Case Western Reserve Univ, Dept Neurol, Cleveland, OH 44106 USA
[12] Univ Hosp Cleveland, Cleveland, OH 44106 USA
[13] Univ Pittsburgh, Dept Neurol, Pittsburgh, PA 15260 USA
[14] Univ Pittsburgh, Dept Psychiat, Pittsburgh, PA 15260 USA
[15] Univ Calif Los Angeles, Dept Neurol, Los Angeles, CA 90024 USA
[16] Univ Calif Los Angeles, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90024 USA