[1] Brown Univ, Warren Alpert Med Sch, Neurol, Providence, RI 02912 USA
[2] Brown Univ, Warren Alpert Med Sch, Orthoped, Providence, RI 02912 USA
[3] Neurol Fdn, Neurol, Providence, RI USA
[4] Neurol Fdn, Providence, RI USA
[5] George Washington Univ, Sch Med, Neurol, Washington, DC 20052 USA
[6] Atrium Hlth, Neurol, Charlotte, NC USA