[1] Linkoping Univ Hosp, Fac Hlth Sci, Dept Mol & Clin Med, Div Clin Immunol, SE-58185 Linkoping, Sweden
[2] Linkoping Univ Hosp, Fac Hlth Sci, Dept Neurosci & Locomot, Div Neurol, SE-58185 Linkoping, Sweden
[3] Orebro Univ Hosp, Neurol Unit, Orebro, Sweden