[1] Univ Tubingen, Dept Hematol Oncol Rheumatol Immunol & Pulmonol, Otfried Muller Str 10, DE-72076 Tubingen, Germany
[2] Vanderbilt Univ, Div Pulm & Crit Care, 221 Kirkland Hall, Nashville, TN 37235 USA
[3] Osped GB Morgagni, Dept Dis Thorax, Via Carlo Forlanini,34 Pavil Morgagni, IT-47100 Forli, Italy
[4] Royal Brompton Hosp, Interstitial Lung Dis Unit, London, England
[5] Mayo Clin, Dept Pathol, Scottsdale, AZ USA
[6] Mayo Clin, Pulm & Crit Care Med, Rochester, MN USA
[7] Wolfson Med Ctr, Pulm Div, Tel Aviv, Israel
[8] Tel Aviv Univ, Tel Aviv, Israel
[9] Osped GB Morgagni, Dept Radiol, Forli, Italy
[10] Osped GB Morgagni, Dept Pathol, Forli, Italy
[11] S Maria Nuova Hosp IRCCS, Dept Pathol, Reggio Emilia, Italy
[12] Verona Univ, Dept Pathol, Verona, Italy
[13] Univ Parma, Div Radiol, Dept Clin Sci, Parma, Italy
[14] Avicenne Univ Hosp, AP HP, Bobigny, France
[15] Free Univ Brussels, Erasme Univ Hosp, Dept Chest Med, Brussels, Belgium
[16] Kings Coll Hosp Fdn Trust, London, England
[17] Univ Politecn Marche, Dept Biomed Sci & Publ Hlth, Ancona, Italy
[18] Azienda Osped Univ Osped Riuniti, Pulm Dis Unit, Dept Internal Med, Ancona, Italy
[19] Krankenhaus Roten Kreuz, Stuttgart, Germany
[20] Bethanien Hosp, Ctr Sleep Med & Resp Care, Clin Pneumol & Allergol, Solingen, Germany
[21] Heidelberg Univ, Dept Pneumol & Crit Care Med, Translat Lung Res Ctr Heidelberg, German Ctr Lung Res DZL,Thoraxklin, Heidelberg, Germany
[22] Univ Duisburg Essen, Univ Hosp, Dept Intervent Pulmonol, Ruhrlandklin, Essen, Germany
[23] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[24] Univ Hosp Santa Creu & St Pau, Resp Dept, Bronchoscopy Unit, Barcelona, Spain
[25] Univ Calif San Francisco, El Camino Hosp, Div Pulm Crit Care Allergy & Sleep Med, San Francisco, CA 94143 USA
[26] Royal Brompton & Harefield NHS Fdn Trust, Resp Biomed Res Unit, Natl Inst Hlth Res, London, England
[27] Imperial Coll, London, England
[28] Acad Med Ctr, Dept Resp Med, Amsterdam, Netherlands
[29] Aarhus Univ Hosp, Dept Resp Dis & Allergol, Aarhus, Denmark