[1] Johns Hopkins Univ, Sch Med, McKusick Nathans Inst Genet Med, Baltimore, MD 21218 USA
[2] Johns Hopkins Univ Hosp, Div Vasc Surg & Endovasc Therapy, Baltimore, MD 21287 USA
[3] Hosp Sick Children, Div Clin & Metab Genet, Toronto, ON M5G 1X8, Canada
[4] Univ Montreal, Dept Cardiac Surg, Montreal Heart Inst, Montreal, PQ, Canada
[5] Johns Hopkins Univ, Sch Med, Dept Pediat, Baltimore, MD 21205 USA
[6] Johns Hopkins Univ, Dept Orthopaed Surg, Baltimore, MD USA
[7] Univ Antwerp, Ctr Med Genet, B-2020 Antwerp, Belgium
[8] Howard Hughes Inst, Chevy Chase, MD USA