[1] Univ Hosp Patras, Dept Resp Med, Patras, Greece
[2] Univ Padua, Resp Dis Unit, Dept Cardiac Thorac Vasc Sci & Publ Hlth, Padua, Italy
[3] Ege Univ Hosp, Dept Pulmonol, Izmir, Turkey
[4] Univ Hosp Leuven, Resp Med, Leuven, Belgium
[5] Careggi Univ Hosp Florence, Intervent Pulmonol Unit, Dept Clin & Expt Med, Florence, Italy
[6] Aarhus Univ Hosp, Dept Resp Dis & Allergy, Ctr Rare Lung Dis, Aarhus, Denmark
[7] Hosp Univ Bellvitge, Unit Interstitial Lung Dis, Resp Dept, Barcelona, Spain
[8] Natl & Kapodistrian Univ Athens, Athens Med Sch, ATTIKON Univ Hosp, Dept Pulm Med 2, Athens, Greece
[9] Thoraxklin Univ Clin Heidelberg & German Ctr L, Dep Pneumol, Ctr Interstitial & Rare Lung Dis, Heidelberg, Germany
[10] SOTIRIA, Hosp Thorac Dis, Dept Resp Med 7, Athens, Greece
[11] Morgagni Pierantoni Hosp, Thorac Dis Dept, Forli, Italy
[12] Univ Thessaly, Sch Med, Dept Resp Med, Larisa, Greece
[13] Corfu Gen Hosp, Resp Med Dept, Corfu, Greece
[14] NHS Gen Hosp G Papanikolaou, Pulm Clin, Thessaloniki, Greece
[15] G Papanikolaou Gen Hosp, Pulm Dept, Thessaloniki, Greece
[16] Univ Crete, Dept Thorac Med & Lab, Mol & Cellular Pneumonol, Sch Med, Iraklion, Greece
[17] Natl & Kapodistrian Univ Athens, Sch Med, Hosp Thorac Dis SOTIRIA, Acad Dept Pneumonol 1, Athens, Greece
[18] Mperial Coll London, Royal Brompton & Harefield, Interstitial Lung Dis Unit, London, England