[1] George Washington Univ, Sch Med, Dept Psychiat & Behav Sci, Washington, DC 20037 USA
[2] George Washington Univ, Sch Med, Dept Pediat, Washington, DC 20037 USA
[3] Tufts Univ, Sch Med, Baystate Med Ctr, Div Child & Adolescent Psychiat, Springfield, MA 01199 USA