Leblanc, Carole J A comparative study of 3 portable oxygen concentrators during a 6-minute walk test in patients with chronic lung disease. [electronic resource] - Respiratory care Oct 2013 - 1598-605 p. digital Publication Type: Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1943-3654 Standard No.: 10.4187/respcare.02275 doi Subjects--Topical Terms: AgedAged, 80 and overEquipment DesignExercise Test--instrumentationFemaleFollow-Up StudiesForced Expiratory VolumeHumansMaleMiddle AgedOximetry--methodsOxygen--metabolismOxygen Consumption--physiologyOxygen Inhalation Therapy--methodsPulmonary Disease, Chronic Obstructive--metabolismRetrospective StudiesTime FactorsTreatment OutcomeWalking--physiology