1. Department of Pharmaceutical Chemistry I, University of Regensburg, D-93040 Regensburg, Germany
2. Nycomed GmbH, Therapeutic Area Oncology, Byk-Gulden Strasse 2, D-78467 Konstanz, Germany
3. Oncotest GmbH, Institute for Experimental Oncology, Am Flughafen 12-14, D-79108 Freiburg, Germany