Paraskevas, Themistoklis, Eleousa Oikonomou, Maria Lagadinou, Vasileios Karamouzos, Nikolaos Zareifopoulos, Despoina Spyropoulou, and Dimitrios Velissaris. 2022. “The Role of High Flow Nasal Oxygen in the Management of Severe COVID-19: A Systematic Review”. Acta Médica Portuguesa 35 (6). Lisbon, Portugal:476-83. https://doi.org/10.20344/amp.16686.