[1] Penn State Coll Med, Dept Pediat, 500 Univ Dr,HS83, Hershey, PA 17033 USA
[2] Bloomsburg Univ, Dept Audiol & Speech Language Pathol, Bloomsburg, PA USA
[3] Penn State Coll Med, Pediat Clin Res Off, Hershey, PA USA
[4] Penn State Coll Med, Dept Audiol, Hershey, PA USA
[5] Cochlear Amer, Centennial, CO USA
[6] Penn State Coll Med, Publ Hlth Sci, Hershey, PA USA