[1] Harvard Univ, Sch Med, Harvard Inst Med, Div Thyroid, Boston, MA 02115 USA
[2] Childrens Hosp, Div Endocrinol, Boston, MA 02115 USA
[3] Childrens Hosp, Dept Pathol, Boston, MA 02115 USA
[4] Childrens Hosp, Dept Pediat, Boston, MA 02115 USA
[5] Childrens Hosp, Dept Surg, Boston, MA 02115 USA
[6] Childrens Hosp, Vascular Anomalies Ctr, Boston, MA 02115 USA
[7] Brigham & Womens Hosp, Dept Med, Div Thyroid, Boston, MA 02115 USA