[1] Carnegie Mellon Univ, Dept Psychol, Ctr Cognit Brain Imaging, Pittsburgh, PA 15213 USA
[2] Univ Alabama, Dept Psychol, Birmingham, AL 35294 USA
[3] Duquesne Univ, Dept Speech Language Pathol, Pittsburgh, PA 15219 USA
[4] Univ Pittsburgh, Sch Med, Dept Psychiat, Pittsburgh, PA USA
[5] Univ Pittsburgh, Sch Med, Dept Neurol, Pittsburgh, PA 15261 USA