[1] Univ Michigan, CS Mott Childrens Hosp, Dept Pediat & Communicable Dis, Div Pediat Cardiol, Ann Arbor, MI 48109 USA
[2] Texas Childrens Hosp, Baylor Sch Med, Dept Cardiol, Houston, TX 77030 USA
[3] Tufts Univ, Sch Med, Off Educ Affairs, Boston, MA 02111 USA
[4] Childrens Hosp Boston, Dept Lab Med, Boston, MA USA
[5] Childrens Hosp Boston, Dept Med, Boston, MA USA
[6] Childrens Hosp Boston, Clin Res Program, Boston, MA USA
[7] Brigham & Womens Hosp, Dept Med, Boston, MA 02115 USA