From the 1Sleep Research Unit, Department of Physiology, University of Turku, Turku, Finland; 2Department of Obstetrics and Gynecology, Turku University Hospital and University of Turku, Turku, Finland; 3Department of Pulmonary Diseases, Tampere University Hospital, Tampere, Finland; 4Department of Biostatistics, University of Turku, Turku, Finland; 5Department of Anesthesiology and Intensive Care, Turku University Hospital, Turku, Finland; and 6Division of Medicine, Department of Pulmonary Diseases, Turku University Hospital and University of Turku, Turku, Finland.
Received November 26, 2013; revised and accepted February 20, 2014.
Funding/support: This study was supported by the Finnish Anti-Tuberculosis Association, Finnish Menopause Society, Finnish Sleep Research Society, Turku University Hospital (government EVO grant), and Väinö and Laina Kivi Foundation.
Financial disclosure/conflicts of interest: None reported.
Address correspondence to: Laura Lampio, MD, Sleep Research Unit, University of Turku, Lemminkäisenkatu 14-18 A, Turku FIN-20520, Finland. E-mail: [email protected]