[1] Wake Forest Sch Med, Dept Neurol, Winston Salem, NC 27101 USA
[2] VISN Mental Illness Res Educ & Clin Ctr MIRECC 6, Salisbury, NC 28144 USA
[3] Univ Colorado, Sch Med, Behav Neurol Sect, Dept Neurol, Aurora, CO USA
[4] Univ Colorado, Sch Med, Behav Neurol Sect, Dept Psychiat, Aurora, CO USA
[5] Marcus Inst Brain Hlth, Rocky Mt Alzheimers Dis Ctr, Aurora, CO USA
[6] Univ Oklahoma, Hlth Sci Ctr, Dept Neurol, Oklahoma City, OK USA
[7] Univ Colorado, Behav Neurol Sect, Dept Neurol, Anschutz Med Campus, Denver, CO 80202 USA
[8] Univ Colorado, Dept Neurol, Behav Neurol Sect, Rocky Mt Alzheimers Dis Ctr, Anschutz Med Campus, Aurora, CO 80202 USA
[9] Univ Colorado, Dept Neurosurg, Behav Neurol Sect, Rocky Mt Alzheimers Dis Ctr, Anschutz Med Campus, Aurora, CO 80202 USA
[10] Univ Kentucky, Commun Sci & Disorders, Lexington, KY USA
[11] Univ Northern Colorado, Audiol & Speech Language Sci, Greeley, CO USA
[12] Rocky Mt Alzheimers Dis Ctr, Aurora, CO USA