Boerner, Bettina Significant improvement of olfactory performance in sleep apnea patients after three months of nasal CPAP therapy - Observational study and randomized trial. [electronic resource] - PloS one 2017 - e0171087 p. digital Publication Type: Journal Article; Randomized Controlled Trial ISSN: 1932-6203 Standard No.: 10.1371/journal.pone.0171087 doi Subjects--Topical Terms: AdultContinuous Positive Airway Pressure--methodsDouble-Blind MethodFemaleHumansMaleMiddle AgedQuality of LifeSleep Apnea, Obstructive--therapyTreatment Outcome