1. Department of Neurobiology, A.I. Virtanen Institute, Neulaniementie 2, 70211 Kuopio, Finland
2. Institute of Clinical Medicine – Neurology, University of Eastern Finland, PO box 1627, 70211 Kuopio, Finland
3. NeuroCenter, Neurology, Kuopio University Hospital, PO box 100, 70029 Kuopio, Finland