[1] Heidelberg Univ, Thoraxklin, Dept Pneumol, Ctr Interstitial & Rare Lung Dis, Heidelberg, Germany
[2] German Ctr Lung Res, Heidelberg, Germany
[3] Heidelberg Univ, Dept Hematol Oncol & Rheumatol, Heidelberg, Germany
[4] Saarland Univ, Univ Med Ctr, Dept Pneumol Allergol & Crit Care Med, Homburg, Germany
[5] Univ British Columbia, Dept Med, Clinician Investigator Program, Vancouver, BC, Canada
[6] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[7] Univ British Columbia, Ctr Heart Lung Innovat, Vancouver, BC, Canada
[8] St Pauls Hosp, Vancouver, BC, Canada