1. Institute for Computer Science, University of Koblenz and Landau, Universittsstr. 1, 56070, Koblenz, Germany
2. University of Marburg, Marburg, Germany
3. Massachusetts Institute of Technology, Cambridge, USA
4. University of British Columbia, Vancouver, Canada
5. GFFT Innovationsförderung GmbH, Bad Vilbel, Germany
6. University of Toronto, Toronto, Canada