[1] Columbia Univ, Irving Med Ctr, Neurol, New York, NY USA
[2] Columbia Univ, Irving Med Ctr, New York, NY USA
[3] Mt Sinai Hosp, Neurol, New York, NY 10029 USA
[4] Mt Sinai Hosp, Pediat Neurol, New York, NY 10029 USA
[5] Univ Pittsburgh, Med Ctr, Neurol, Pittsburgh, PA USA
[6] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA