1. Laboratory for Cell and Tissue Engineering Department of Biomedical Engineering Eindhoven Univesity of Technology P O Box 513 Eindhoven 5600 MB The Netherlands
2. Institute for Complex Molecular Systems P O Box 513 Eindhoven 5600 MB The Netherlands
3. Laboratory of Chemical Biology Department of Biomedical Engineering Eindhoven University of Technology P O Box 513 Eindhoven 5600 MB The Netherlands