[1] Charite, Interdisciplinary Ctr Sleep Med, D-13353 Berlin, Germany
[2] Inst Psychophysiol & Rehabil, Palanga, Lithuania
[3] Hosp Arnau Vilanova, Lleida, Spain
[4] Univ Palermo, Biomed Dept Internal Ans Specialist Med DIBIMIS, Osped V Cervello, Palermo, Italy
[5] Aintree Univ Hosp NHS Fdn Trust, Aintree, England
[6] Univ Antwerp Hosp, Edegem, Belgium
[7] Safarik Univ Kosice, Fac Med, Kosice, Slovakia
[8] Med Spectrum Twente, Dept Pulm Med, Enschede, Netherlands
[9] Umea Univ, Dept Surg, Umea, Sweden
[10] Univ Iceland, Fac Med, Reykjavik, Iceland
[11] Sahlgrens Univ Hosp, Sleep Disorder Ctr, Gothenburg, Sweden
[12] Glostrup Univ, Danish Ctr Sleep Med, Glostrup, Denmark
[13] Technion Israel Inst Technol, Fac Med, Diagnost Sleep Lab, Haifa, Israel
[14] Grenoble Univ Hosp CHU Michallon, Grenoble, France
[15] LKH Enzenbach, A-8112 Gratwein, Austria
[16] CNR, Ist Biomed & Immunol Mol, Palermo, Italy
[17] Hosp Clin Resp, Barcelona, Spain
[18] Cyprus Inst Neurol & Genet, Nicosia, Cyprus
[19] Natl Res Inst TB & Lung Dis, Warsaw, Poland
[20] Charles Univ Prague, Fac Med 1, Dept Neurol, Prague, Czech Republic
[21] Gen Univ Hosp, Prague, Czech Republic
[22] Clin Univ St Luc, B-1200 Brussels, Belgium
[23] Turku Univ Hosp, Dept Pulm Dis & Clin Allergolgy, FIN-20520 Turku, Finland
[24] Univ Turku, Dept Physiol, Sleep Res Unit, Turku, Finland
[25] Univ Giessen, Lung Ctr, Giessen, Germany
[26] Democritus Univ Thrace, Sch Med, Dept Pneumonol, Alexandroupolis, Greece
[27] Riga Stradins Univ, Inst Stomatol, Sleep Lab, Riga, Latvia
[28] Hosp Copenhagen, Hellerup, Denmark
[29] Palacky Univ, Pathol Physiol Med Fac, CR-77147 Olomouc, Czech Republic
[30] Univ Latvia, Inst Cardiol, Riga, Latvia
[31] St Vincents Univ Hosp, Dublin 4, Ireland
[32] Univ Milano Bicocca, Dept Clin Med & Prevent, Milan, Italy
[33] Maastricht Univ Med Ctr, Maastricht, Netherlands