1. Center for Molecular Medicine (ZMMK), University of Cologne, 50931 Cologne, Germany
2. Institute for Anatomy, University of Cologne, 50931 Cologne, Germany
3. Institute for Cardiovascular Physiology, University of Düsseldorf, 40225 Düsseldorf, Germany
4. Institute for Pathology, University of Cologne, 50931 Cologne, Germany
5. Department of Dermatology, University of Münster, 48149 Münster, Germany
6. Department of Cell Biology & Immunology, Vrije Universiteit Amsterdam, 1081 BT Amsterdam, The Netherlands
7. Center for Molecular Medicine (ZMMK), University of Cologne, 50931 Cologne, Germany; Division of Gene Therapy, University of Ulm, 89081 Ulm, Germany