Safari, S. ., A. H. Lotfi, and M. . Hekmatafshar. “The Importance of Non-Invasive Mechanical Ventilation: Current Status in Iran”. Annals of Anesthesiology and Critical Care, vol. 2, no. 1, Dec. 2016, https://journals.sbmu.ac.ir/index.php/anescc/article/view/33415.