Challenges in obstructive sleep apnoea.

McNicholas WT Department of Respiratory and Sleep Medicine, St Vincent's University Hospital, Dublin 4 Ireland; School of Medicine, University College Dublin, Ireland; First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. Electronic address: walter.mcnicholas@ucd.ie.
Bassetti CL Neurology Department, Inselspital, Bern University Hospital, Bern, Switzerland.
Ferini-Strambi L Department of Neurology OSR-Turro, Sleep Disorders Center, Università Vita-Salute San Raffaele, Milan, Italy.
Pépin JL HP2 Laboratory, INSERM U1042, Grenoble Alpes University, Grenoble, France; EFCR Laboratory, Thorax and Vessels Division, Grenoble Alpes University Hospital, Grenoble, France.
Pevernagie D Sleep Medicine Center, Kempenhaeghe Foundation, Heeze, Netherlands; Department of Internal Medicine, Faculty of Medicine and Health Sciences, Ghent University, Belgium.
Verbraecken J Department of Pulmonary Medicine, and Multidisciplinary Sleep Disorders Centre, Antwerp University Hospital and University of Antwerp, Antwerp, Belgium.
Randerath W Institute of Pneumology at the University of Cologne, Bethanien Hospital, Clinic for Pneumology and Allergology, Centre of Sleep Medicine and Respiratory Care, Solingen, Germany.