[1] Harvard Univ, Sch Med, Brigham & Womens Hosp, Div Cognit & Behav Neurol, Boston, MA 02115 USA
[2] Amer Univ Beirut, Med Ctr, Beirut, Lebanon
[3] Univ Groningen, Univ Med Ctr Groningen, Groningen, Netherlands
[4] Amer Univ Beirut, Dept Psychiat, Beirut, Lebanon
[5] Amer Univ Beirut, Dept Internal Med, Beirut, Lebanon