[1] Johns Hopkins Univ, Sch Med, Neurol, Baltimore, MD USA
[2] Univ Utah, Sch Med, Pediat, Salt Lake City, UT USA
[3] Charite Univ Med Berlin, Neurol, Berlin, Germany
[4] Neuroclinica, Neurol, Medellin, Colombia
[5] Int Neurorehabil Inst, Lutherville Timonium, MD USA