1. Pediatric Department, HFR Hospital Fribourg, Villars-sur-Glâne, Switzerland
2. Pediatric Surgery, Pediatric Department, University Hospital CHUV, Lausanne, Switzerland
3. Pediatric Oncology Research, Pediatric Department, University Hospital CHUV, Lausanne, Switzerland
4. Service d'anatomie pathologique, Hôpital Robert Debré, Paris, France
5. Pediatric Pathology, Pathology Department, University Hospital CHUV, Lausanne, Switzerland
6. INSERM U830, Institut Curie, Centre de Recherche, Paris, France
7. Cell and Developmental Biology, Institute of Anatomy, University of Zürich, Zürich, Switzerland