1. Unité de Recherche EA 4340, Versailles University, Boulogne, France;
2. Pathology Department, Ambroise Paré Hospital, Assistance Publique - Hôpitaux de Paris, Boulogne, France;
3. Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, NY;
4. Department of Internal Medicine & French Reference Center for Rare Auto-immune & Systemic Diseases, Hôpital Pitié-Salpêtrière Hospital, Assistance Publique - Hôpitaux de Paris, Paris, France;
5. Pierre and Marie Curie University, Paris, France;
6. Department of Pathology, Hôpital Pitié-Salpêtrière, Assistance Publique - Hôpitaux de Paris, Paris, France;
7. Experimental Therapeutics Unit and
8. Human Oncology and Pathogenesis Program and Leukemia Service, Memorial Sloan-Kettering Cancer Center, New York, NY;
9. Department of Hematology, Shaare Zedek Medical Center, Jerusalem, Israel;
10. Université Paris-Est Créteil, Créteil, France;
11. Department of Pathology, Hospital Henri Mondor, Assistance Publique - Hôpitaux de Paris, Créteil, France;
12. Department of Pathology and
13. Department of Internal Medicine, Foch Hospital, Suresne, France;
14. Department of Internal Medicine, Ambroise Paré Hospital, Assistance Publique - Hôpitaux de Paris, Boulogne, France;
15. Université Paris Sorbonne Cité, INSERM, Paris, France; and
16. Department of Pediatrics & French Reference Center for Langerhans Cell Histiocytosis, Trousseau Hospital, Assistance Publique - Hôpitaux de Paris, Paris, France