1. Department of Solid State Sciences
2. Ghent University
3. B-9000 Gent
4. Belgium
5. Center for Molecular Modeling
6. Ghent University, Tech Lane Ghent Science Park Campus A, Technologiepark 46
7. 9052 Zwijnaarde
8. Department of Chemistry
9. Department of Physics
10. University of Antwerp
11. B-2610 Antwerp