N. Pavlidis , Professor of Medical Oncology, Department of Medical Oncology, School of Medicine, University of Ioannina, 451 Ioannina, Greece email: npavlid@cc.uoi.gr
R.A. Stahel , Laboratory for Molecular Oncology, Department of Oncology, University Hospital Zuerich, Haeldeliweg 4, CH-8044 Zuerich, Switzerland fax: +41 1 634 2872 email: rolf.stahel@usz.ch
