1. Department of Internal Medicine and French reference Center for Rare Auto-immune and Systemic Diseases, Assistance Publique–Hôpitaux de Paris (AP-HP), Pitié-Salpêtrière Hospital, Paris, France;
2. Université Pierre et Marie Curie, UPMC University Paris 6, Paris, France;
3. Research Unit (EA) EA4340 and Pathology Laboratory, Versailles University and AP-HP, Boulogne, France;
4. Departments of Nuclear Medicine,
5. Pathology,
6. Radiology,
7. Neuroradiology, and
8. Pharmacy, Hôpital Pitié-Salpêtrière, University Paris 6, AP-HP, Paris, France,
9. Department of Internal Medicine, Pontchaillou University Hospital, Rennes Cedex, France, and
10. Department of Pediatry, AP-HP, Centre de Référence des Histiocytoses, Hôpital Trousseau, Paris, France