[1] Virginia Commonwealth Univ, Dept Pediat, Div Endocrinol, Richmond, VA 23284 USA
[2] Univ Childrens Hosp Ljubljana, Univ Med Ctr, Dept Endocrinol, Diabet & Metab Dis, Ljubljana, Slovenia
[3] Univ Florida, Dept Pediat, Div Endocrinol, Gainesville, FL USA