1. University of Eastern Finland School of Educational Sciences and Psychology Joensuu Campus PO Box 111, FI-80101 Joensuu
2. Free University of Bolzano/Bozen Faculty of Education Regensburgerallee, 16 39042-Brixen (IT)
3. Justus Liebig University Institution for Special Education Karl-Glöckner-Straße 21 B DE-35394 Gießen
4. University of Helsinki Open University PL Box 8, 00014 University of Helsinki