[1] Duisburg Essen Univ, Interstitial & Rare Lung Dis Unit, Ruhrlandklin, Univ Hosp, Duisburg, Germany
[2] Aarhus Univ Hosp, Dept Resp Dis & Allergy, Aarhus, Denmark
[3] Siena Univ Hosp, Sect Resp Dis & Lung Transplantat, Dept Clin Med & Neurosci, Siena, Italy
[4] Boehringer Ingelheim GmbH & Co Kg, Ingelheim, Germany
[5] Boehringer Ingelheim Int GmbH, Ingelheim, Germany
[6] Alfred Hlth, Dept Allergy Immunol & Resp Med, Melbourne, Vic, Australia
[7] Monash Univ, Dept Med, Melbourne, Vic, Australia