1. Department of Maxillofacial and Plastic Surgery; Necker Hôpital Enfants Malades; APHP Paris France
2. Université Paris Descartes; Paris France
3. Department of Pathology; Hôpital Armand-Trousseau; APHP Paris France
4. Faculté de Médecine Pierre et Marie Curie; Université Paris VI; Paris France
5. Department of Hematology; Hôpital Armand-Trousseau; APHP Paris France