1. Max Planck Institute for Molecular Cell Biology and Genetics, Pfotenhauer-Strasse 108, D-01307 Dresden, Germany.
2. Franz Volhard Clinic and Max-Delbrück-Center for Molecular Medicine, Humboldt University Berlin, Wiltberg-Strasse 50, D-13125 Berlin, Germany.
3. Hannover Medical School, Karl-Neuberg-Strasse 1, D-30625 Hannover, Germany.
4. Institute of Anatomy, Technical University of Dresden, Fetscher-Strasse 74, D-01307 Dresden, Germany.
5. Max-Delbrück-Center for Molecular Medicine, Robert-Roessle-Strasse 10, D-13125 Berlin, Germany.