1 Dept of Respiratory Medicine, Unit for Interstitial Lung Diseases, University Hospitals Leuven, Leuven, Belgium.
2 Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, Centre de compétence des maladies pulmonaires rares, INSERM U1152, Université Paris Diderot, LABEX Inflamex, DHU FIRE, Paris, France [email protected].