[1] Tampere Univ Hosp, Dept Neurosci & Rehabil, POB 2000, F-33521 Tampere, Finland
[2] Univ Tampere, Fac Social Sci, Tampere, Finland
[3] Tampere Univ Hosp, Pirkanmaa Hosp Dist, Med Imaging Ctr, Dept Radiol, Tampere, Finland
[4] Tampere Univ Hosp, Dept Neurosurg, Tampere, Finland