1. Department of Toxicology, Center for Pharmaceutical Research, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
2. Laboratory of Experimental Hematology, Institut Jules Bordet, Université Libre de Bruxelles (ULB), Brussels, Belgium.
3. Department of Morphology and Molecular Pathology, Katholieke Universiteit Leuven (KUL), University Hospital Leuven, Leuven, Belgium.
4. Center of Physiology, Institute of Neurophysiology, University of Cologne, Cologne, Germany.