1. PharmaCenter Bonn, Pharmaceutical Institute, Department of Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
2. MediCity Research Laboratory, University of Turku, 20520 Turku, Finland
3. Department of Integrated Oncology, Center for Integrated Oncology (CIO), University Hospital Bonn, Bonn D-53127, Germany
4. Institute of Cell Biology and Neuroscience, Goethe-University, D-60438 Frankfurt am Main, Germany