Oxygen therapy limiting peripheral oxygen saturation to 89-93% is associated with a better survival prognosis for critically ill COVID-19 patients at high altitudes. - Viruez-Soto A; Arias S; Casas-Mamani R; Rada-Barrera G; Merino-Luna A; Molano-Franco D; Tinoco-Solorzano A; Marques DA; Zubieta-DeUrioste N; Zubieta-Calleja G; Arias-Reyes C; Soliz J (Respiratory physiology & neurobiology, 2022)