[1] VA North Texas Hlth Care Syst, Med Serv, Neurol Sect, 4500 South Lancaster Rd, Dallas, TX 75216 USA
[2] Barzilai Govt Hosp, Dept Neurol, Ashqelon, Israel
[3] Ben Gurion Univ Negev, Fac Hlth Sci, Beer Sheva, Israel
[4] Tel Aviv Univ, Dept Neurol, Sackler Fac Med, Tel Aviv, Israel
[5] Univ Texas Southwestern Med Ctr Dallas, Dept Neurol & Neurotherapeut, Dallas, TX 75390 USA
[6] Tech Univ Munich, Klinikum Rechts Isar, Dept Neurol, Munich, Germany