1. Screvo Ltd, P.O. Box 217, 7500 AE, Enschede, The Netherlands
2. CellCoTec, Prof. Bronkhorstlaan 10-48, 3723MB Bilthoven, The Netherlands
3. Department of Tissue Regeneration, MIRA Institute, University of Twente, Drienerlolaan 5, Zuidhorst, 7522 NB Enschede, The Netherlands. Fax: +31 53489 2150; Tel: +31 53489 3400