[1] Childrens Hosp Philadelphia, Div Endocrinol, Philadelphia, PA 19104 USA
[2] Univ Colorado, Sch Med, Div Neonatol, Aurora, CO USA
[3] Cook Childrens Med Ctr, Dept Endocrinol, Ft Worth, TX USA
[4] Waikato Hosp, Newborn Intens Care Unit, Hamilton, New Zealand
[5] Texas Childrens Hosp, Houston, TX 77030 USA
[6] Great Ormond St Hosp Sick Children, Dept Endocrinol, London WC1N 3JH, England
[7] Massachusetts Gen Hosp, Div Endocrinol, Boston, MA 02114 USA
[8] Mayo Clin, Div Prevent Med, Rochester, MN USA
[9] Childrens Hosp Philadelphia, Div Neonatol, Philadelphia, PA 19104 USA
[10] Childrens Hosp Pittsburgh, Div Endocrinol, Pittsburgh, PA 15213 USA
[11] Univ Florida, Coll Med, Div Pediat Endocrinol, Gainesville, FL USA
[12] Washington Univ, Dept Pediat, Div Endocrinol & Diabet, St Louis, MO 63130 USA
[13] St Louis Childrens Hosp, St Louis, MO 63178 USA
[14] Boston Childrens Hosp, Div Endocrinol, Boston, MA USA