1. AP-HP, Department of Internal Medicine; national referral center for adult's immune cytopenia, Henri-Mondor University Hospital, Université Paris-Est Créteil (UPEC); Créteil France
2. AP-HP, Department of Internal Medicine; national referral center for systemic lupus, Pitié Salpêtrière University Hospital, AP-HP, Université Pierre et Marie Curie; Paris France
3. Université Paris-Est Créteil (UPEC), DHU A-TVB, IMRB, EA 7376 CEpiA (Clinical Epidemiology And Ageing Unit); Créteil F-94000 France
4. Public Health Department; AP-HP, Henri-Mondor University Hospital; Créteil France
5. AP-HP, Department of Internal Medicine; National referral center for rare auto-immune and systemic diseases, Cochin University Hospital, AP-HP, Université Paris Descartes (Paris 5), INSERM U 1153; Paris France
6. Department of Internal Medicine and Clinical Immunology; Claude Huriez University Hospital; Lille France
7. Department of Internal Medicine; AP-HP, Bichat University Hospital; Paris France
8. Department of Internal Medicine; AP-HP, University Hospital Paris Sud; Le Kremlin Bicêtre France
9. UPMC Universite, Groupe Hospitalier Pitié-Salpêtrière, AP-HP, Department of Internal Medicine and Clinical Immunology; referral center for rare and systemic autoimmune diseases; Paris France
10. Department of Internal Medicine; Bretonneau University Hospital; Tours France
11. Hautepierre University Hospital, department of Rheumatology; referral center for rare and systemic autoimmune diseases; Strasbourg France