[1] McGill Univ, Ctr Hlth, Res Inst, Resp Epidemiol & Clin Res Unit, Montreal, PQ H4A 3J1, Canada
[2] Hosp Univ Cent Asturias, Fac Med, Oviedo, Spain
[3] Osped Orlandi, Lung Dept, Bussolengo Vr, Italy
[4] Krankenhaus Kloster Grafschaft, Schmallenberg, Germany
[5] Air Liquide Healthcare, Med Res & Dev, Jouy En Josas, France
[6] Hop Cochin, AP HP, Serv Physiol Clin, Paris, France
[7] Univ Hosp Strasbourg, Dept Pulm Med, Translat Med Federat Strasbourg, Strasbourg, France