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Mallet, Maria Christina; Hitzler, Michael; Lurà, Marco; Kuehni, Claudia E; Regamey, Nicolas (2022). Facemasks do not lead to abnormal gas exchange during treadmill exercise testing in children [research letter]. ERJ Open Research, 8(1), 00613-2021. European Respiratory Society 10.1183/23120541.00613-2021
