[1] Univ Uppsala Hosp, Dept Neurosci Neurol, SE-75185 Uppsala, Sweden
[2] Tommy Lewander Consulting, Uppsala, Sweden
[3] Wayne State Univ, Sch Med, Clin Neurosci Ctr, Southfield, MI USA
[4] Ullevaal Univ Hosp, Dept Neurol, Oslo, Norway
[5] Akershus Univ, HOKH Helse Ost Hlth Serv Res Ctr, Lorenskog, Norway