1. Department of Technical Physics, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland
2. Kuopio University Hospital, University of Eastern Finland, Puijonlaaksontie 2, 70210 Kuopio, Finland
3. School of Medicine, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland