[1] Univ Massachusetts, Sch Med, Off Fac Affairs, Worcester, MA 01655 USA
[2] Penn State Univ, Coll Med, Dept Pediat, Hershey, PA USA
[3] Penn State Univ, Coll Med, Dept Neurol & Behav Sci, Hershey, PA USA
[4] Penn State Univ, Coll Med, Off Postdoctoral Affairs, Hershey, PA USA
[5] Penn State Univ, Coll Med, Dept Ophthalmol, Hershey, PA USA
[6] Penn State Univ, Sch Behav Sci & Educ, Dept Adult Educ, Harrisburg, PA USA