[1] Purdue Univ, Dept Psychol Sci, W Lafayette, IN 47907 USA
[2] VA Palo Alto Hlth Care Syst, Palo Alto, CA USA
[3] Univ Penn, Dept Psychiat, Bipolar Disorders Program, Philadelphia, PA 19104 USA
[4] Massachusetts Gen Hosp, Boston, MA 02114 USA
[5] Harvard Univ, Sch Med, Boston, MA USA