[1] Baylor Univ, Med Ctr, Inst Metab Dis, Dallas, TX USA
[2] Univ Texas, SW Med Ctr, Dept Neurol, Dallas, TX 75235 USA
[3] Univ Texas, SW Med Ctr, Dept Pathol, Dallas, TX USA
[4] Neo Gen Screening, Pittsburgh, PA USA
[5] Clin Special Children, Lancaster, PA USA