[1] Boston Childrens Hosp, Dept Cardiol, 300 Longwood Ave, Boston, MA 02115 USA
[2] Massachusetts Dept Publ Hlth, Boston, MA USA
[3] Massachusetts Gen Hosp, Dept Cardiol, Boston, MA 02114 USA
[4] Emory Univ, Dept Cardiol, Atlanta, GA 30322 USA
[5] Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA USA
[6] MassGen Hosp Children, Med Genet, Boston, MA USA
[7] Stanford Univ, Dept Med, Sch Med, Stanford, CA 94305 USA
[8] New York State Dept Hlth, Albany, NY USA
[9] SUNY Albany, Dept Epidemiol, Sch Publ Hlth, Rensselaer, NY 12144 USA
[10] Albert Einstein Coll Med, Dept Med, Bronx, NY 10467 USA