1. Department of Cell Biology, University of Groningen, University Medical Center Groningen, AV Groningen, The Netherlands
2. Interfaculty Institute of Cell Biology, Eberhard Karls University Tuebingen, Tuebingen, Germany
3. International Max Planck Research School ’From Molecules to Organisms’, Max Planck Institute for Developmental Biology and Eberhard Karls University Tuebingen, Tuebingen, Germany
4. Institut Necker Enfants-Malades (INEM), INSERM U1151-CNRS UMR 8253, Université de Paris, Paris, France
5. Adjuvatis, Lyon, France
6. Laboratory of Tissue Biology and Therapeutic Engineering, CNRS UMR 5305, Université Claude Bernard Lyon 1, France