[1] Ctr Valaisan Pneumol, CH-3962 Montana, Switzerland
[2] Hop St Marguerite, Marseille, France
[3] Univ Hosp UZ Brussels, Brussels, Belgium
[4] Univ Hosp Alexandroupolis, Alexandroupolis, Greece
[5] Tygerberg Acad Hosp, Cape Town, South Africa
[6] Azienda Osped Riunti, Ancona, Italy
[7] Spedali Civil Brescia, I-25125 Brescia, Italy
[8] Lungenklin Heckeshorn, Berlin, Germany
[9] Hosp Univ Virgen Rocio Sevilla, Seville, Spain
[10] Harbor UCLA Med Ctr, Torrance, CA 90509 USA
[11] Canisius Wilhemina Hosp, Dept Pulm Dis B01, Nijmegen, Netherlands