Validity of Peripheral Oxygen Saturation Measurements with the Garmin Fēnix® 5X Plus Wearable Device at 4559 m. - Lisa M. Schiefer; Gunnar Treff; Franziska Treff; Peter Schmidt; Larissa Schäfer; Josef Niebauer; Kai E. Swenson; Erik R. Swenson; Marc M. Berger; Mahdi Sareban (Sensors, 2021)