[1] Boston Childrens Hosp, Dept Psychiat, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Barbados Nutr Study, Bridgetown, Barbados
[4] Judge Baker Childrens Ctr, Boston, MA USA
[5] McLean Hosp, Lab Psychiat Biostat, Boston, MA USA
[6] Harvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA