[1] Penn State Univ, Coll Med, Milton S Hershey Med Ctr, Div Endocrinol Diabet & Metab,Dept Med, Hershey, PA 17033 USA
[2] Penn State Univ, Coll Med, Dept Publ Hlth Sci, Hershey, PA 17033 USA
[3] Penn State Univ, Coll Med, Dept Obstet & Gynecol, Hershey, PA 17033 USA
[4] Penn State Univ, Coll Med, Inst Heart & Vasc, Hershey, PA 17033 USA