1. Pharmaceutical Biochemistry and Bioanalytics, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
2. Bonn-Aachen International Center for Information Technology, University of Bonn, Endenicher Allee 19 C, D-53115 Bonn, Germany
3. Institute for Experimental Hematology, University Hospital Bonn, Sigmund-Freud-Straße 25, D-53127 Bonn, Germany