[1] Boston Childrens Hosp, Dept Med, Boston, MA USA
[2] Boston Childrens Hosp, Dept Psychiat, Boston, MA USA
[3] Harvard Med Sch, Boston, MA 02115 USA
[4] Univ Michigan, Sch Med, CS Mott Childrens Hosp, Dept Pediat, Ann Arbor, MI USA
[5] Univ Childrens Hosp, Child Dev Ctr, Zurich, Switzerland
[6] Univ Zurich, Dept Pediat, Zurich, Switzerland
[7] Boston Childrens Hosp, Dept Psychiat, Boston, MA USA
[8] Boston Childrens Hosp, Dept Neurol, Boston, MA USA
[9] Med Coll Wisconsin, Childrens Wisconsin & Dept Pediat, Herma Heart Inst, Milwaukee, WI 53226 USA
[10] Cincinnati Childrens, Dept Dev & Behav Pediat, Cincinnati, OH USA
[11] Boston Childrens Hosp, Dept Cardiol, Boston, MA USA
[12] Natl Childrens Hosp, Dept Cardiol, Washington, DC USA
[13] Natl Childrens Hosp, Dept Crit Care, Washington, DC USA
[14] George Washington Univ, Sch Med & Hlth Sci, Dept Pediat, Washington, DC 20052 USA