[1] Heidelberg Univ, Ctr Interstitial & Rare Lung Dis, Thoraxklin, Pneumol, Heidelberg, Germany
[2] German Ctr Lung Res, Heidelberg, Germany
[3] Silkeborg Reg Hosp, Univ Res Clin Innovat Patient Pathways, Diagnost Ctr, Silkeborg, Denmark
[4] Aarhus Univ Hosp, Ctr Rare Lung Dis, Dept Resp Dis & Allergy, Aarhus, Denmark