[1] Univ Hosp Ctr Zagreb, Dept Neurol, Zagreb, Croatia
[2] Univ Med Ctr Ljubljana, Dept Neurol, Ljubljana, Slovenia
[3] Univ Szeged, Dept Neurol, Szeged, Hungary
[4] Univ Clin Ctr Serbia, Neurol Clin, Belgrade, Serbia
[5] Clin Ctr Montenegro, Dept Neurol, Podgorica, Montenegro
[6] Sestre Milosrdnice Univ Hosp Ctr, Dept Neurol, Zagreb, Croatia
[7] Univ Hosp Dubrava, Dept Neurol, Zagreb, Croatia
[8] Natl Mem Hosp Dr Juraj Njavro Vukovar, Dept Neurol, Vulovar, Croatia
[9] Gen Hosp Virovitica, Dept Neurol, Virovitica, Croatia
[10] Gen Hosp Bjelovar, Dept Neurol, Bjelovar, Croatia
[11] Gen Hosp Zabok, Zabok, Croatia
[12] Univ Belgrade, Inst Epidemiol, Fac Med, Belgrade, Serbia