[1] GG Kuvatovs Republican Clin Hosp, Dept Neurol, Ufa 450005, Russia
[2] Bashkir State Med Univ, Dept Neurol Neurosurg & Med Genet, Ufa, Russia
[3] Univ Edinburgh, Ctr Clin Brain Sci, Edinburgh, Midlothian, Scotland
[4] Univ Oslo, Dept Nursing Sci, Oslo, Norway
[5] Lovisenberg Diakonale Hosp, Dept Res, Oslo, Norway