↑Chughtai, Morad; Gwam, Chukwuweike U.; Mohamed, Nequesha; Khlopas, Anton; Newman, Jared M.; Khan, Rafay; Nadhim, Ali; Shaffiy, Shervin; Mont, Michael A. (2017). "The Epidemiology and Risk Factors for Postoperative Pneumonia". Journal of Clinical Medicine Research. 9 (6): 466–475. doi:10.14740/jocmr3002w. PMC5412519. PMID28496546.
↑Seyller, Hannah; Gottlieb, Michael; Colla, Joseph (October 2021). "A breath of fresh air: The role of incentive spirometry in the treatment of COVID-19". The American Journal of Emergency Medicine. 48: 369. doi:10.1016/j.ajem.2021.01.084. PMC8500986. PMID33558097.
↑Bernal-Utrera, Carlos; Anarte-Lazo, Ernesto; Gonzalez-Gerez, Juan Jose; De-La-Barrera-Aranda, Elena; Saavedra-Hernandez, Manuel; Rodriguez-Blanco, Cleofas (8 February 2021). "Could Physical Therapy Interventions Be Adopted in the Management of Critically Ill Patients with COVID-19? A Scoping Review". International Journal of Environmental Research and Public Health. 18 (4): 1627. doi:10.3390/ijerph18041627. PMC7915254. PMID33567748.
↑Shan, Mia X; Tran, Yen M; Vu, Kim T; Eapen, Blessen C (August 2020). "Postacute inpatient rehabilitation for COVID-19". BMJ Case Reports. 13 (8) e237406. doi:10.1136/bcr-2020-237406. PMC7437681. PMID32816941.