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Impact of Surgical Mask, FFP2 Mask and FFP3 Mask (With and Without Exhalation Valve) on Exercise Tolerance and Blood Gas Parameters of Patients With Known Lung Disease and Long-term Oxygen Therapy

University Hospital Regensburg · 2023
ClinicalTrials.gov · Datasets · License: Public Domain · 2023
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face mask, longterm oxygen therapy, observational
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