1. Max-Delbrück-Center for Molecular Medicine; Berlin Germany
2. Institute of Veterinary Pathology; Berlin Germany
3. Normal and Pathological Development of Melanocytes; 91405 Orsay France
4. Centre National de la Recherche Scientifique (CNRS) UMR3347; 91405 Orsay France
5. INSERM U1021; 91405 Orsay France
6. Equipe Labellisee e Ligue Nationale contre le Cancer; 91405 Orsay France
7. Institute of Immunology, Charité Campus Berlin Buch; Berlin Germany
8. Berlin Institute of Health; Berlin Germany