[1] Imperial Coll London, Royal Brompton & Harefield Hosp, London, England
[2] Imperial Coll London, Natl Heart & Lung Inst, London, England
[3] Univ Chicago, Chicago, IL USA
[4] Claude Bernard Univ Lyon 1, Louis Pradel Hosp, Natl Reference Ctr Rare Pulm Dis, Lyon, France
[5] Johns Hopkins Med, Baltimore, MD USA
[6] Univ Michigan, Ann Arbor, MI USA
[7] Univ Calgary, Dept Med, Calgary, AB, Canada
[8] McMaster Univ, Hamilton, ON, Canada
[9] St Josephs Healthcare, Hamilton, ON, Canada
[10] Tosei Gen Hosp, Seto, Aichi 9, Japan
[11] Royal Brompton & Harefield Hosp, London, England
[12] Florence Univ, Florence, Italy
[13] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA USA
[14] Nat Jewish Hlth, Denver, CO USA