Bertacchini, Laura, Mara Paneroni, Laura Comini, Simonetta Scalvini, and Michele Vitacca. “Recovering of Oxygenation, Physical Function and Disability in Patients With COVID-19”. Monaldi Archives for Chest Disease (April 9, 2021). Accessed June 18, 2021. https://monaldi-archives.org/index.php/macd/article/view/1817.