Nasal high-flow oxygen therapy in COVID-19 patients does not cause environmental surface contamination. (October 2021) - Roca, O.; Pacheco, A.; Rodon, J.; Antón, A.; Vergara-Alert, J.; Armadans, L.; Segalés, J.; Pumarola, T.; Campins, M.; Ferrer, R.; Rodríguez-Garrido, V.