1. Center for Education and Research on Macromolecules (CERM), Chemistry Department; University of Liege; B6 Sart-Tilman B-4000 Liege Belgium
2. Laboratory of Histology - Cytology; University of Liege; B6 Sart-Tilman B-4000 Liege Belgium
3. Louvain Drug Research Institute (LDRI); Université Catholique de Louvain; Avenue Mounier 73 B-1200 Brussels Belgium