[1] Univ Pavia, Rheumatol, Pavia, Italy
[2] Irccs Found Policlin S Matteo, Pavia, Italy
[3] Univ Hosp, Rheumatol, Oslo, Norway
[4] Hosp Univ Marques de Valdecilla, Rheumatol, Santander, Spain
[5] Univ Brescia, Rheumatol, Brescia, Italy
[6] AO Spedali Civili, Brescia, Italy
[7] Hosp Univ Princesa, Rheumatol, Madrid, Spain
[8] Hosp Gen Univ G Maranon, Rheumatol, Madrid, Spain
[9] ACURA Ctr, Rheumatol, Bad Kreuznach, Germany
[10] Univ Hosp J Gutenberg, Rheumatol, Mainz, Germany
[11] Inst Nacl Enfermedades Resp, ILD Unit, Tlalpan, Mexico
[12] Inst Nacl Enfermedades Resp, Rheumatol Unit, Tlalpan, Mexico
[13] Univ Hosp Ramon & Cajal, Rheumatol, Madrid, Spain
[14] Univ Marche, Rheumatol, Jesi, Italy
[15] C Urbani Hosp, Jesi, Italy
[16] Univ Bari, Rheumatol, Bari, Italy
[17] Hosp Univ La Paz, Rheumatol, Madrid, Spain
[18] Univ Duisburg Essen, Univ Hosp, Interstitial & Rare Lung Dis Unit, Ruhrlandklin, Essen, Germany
[19] Citta Salute & Sci, Rheumatol, Turin, Italy
[20] Humanitas Res Hosp, Rheumatol, Rozzano, Italy
[21] Italian Soc Rheumatol, Epidemiol Unit, Milan, Italy
[22] Nuovo Osp S Giovanni Dio, Rheumatol, Florence, Italy
[23] Univ Padua, Rheumatol, Padua, Italy