[1] Med Univ Wien, Vienna, Austria
[2] Univ Clin Resp Dis & Allergy Golnik, Golnik, Slovenia
[3] Pulm & Internist Onkol Rehabil Zurcher RehaZentre, Davos, Switzerland
[4] Ludwig Maximilians Univ LMU Munich, Dept Internal Med 5, Munich, Germany
[5] Comprehens Pneumol Ctr CPC M, Munich, Germany
[6] German Ctr Lung Res DZL, Munich, Germany
[7] Univ Klinikum Regensburg, Regensburg, Germany
[8] Evangelisches Krankenhaus Bielefeld, Kinderzentrum Bethel, Bielefeld, Germany
[9] Johannes Gutenberg Univ Mainz, Univ Med, Mainz, Germany