iii Winfried Randerath Clinic of Pneumology and Allergology Center for Sleep Medicine and Respiratory Care Bethanien Hospital Solingen, Germany randerath@klinik-bethanien.de Anita K. Simonds NIHR Respiratory Disease Biomedical Research Unit Royal Brompton and Hareeld NHS Foundation Trust London, UK a.simonds@rbht.nhs.uk Frank Smeenk Dept of Pulmonology Catharina Hospital Eindhoven, The Netherlands frank.smeenk@catharinaziekenhuis.nl Robert Thurnheer Ambulante Medizinische Diagnostik Kantonsspital Münsterlingen, Switzerland robert.thurnheer@stgag.ch Silvia Ulrich Clinic of Pneumology University Hospital Zurich Zurich, Switzerland silvia.ulrich@usz.ch Eleftherios Zervas 7th Respiratory Medical Dept Athens Chest Hospital Athens, Greece lefzervas@yahoo.gr