1.
Mittal A, Varshney M, Rathi V, Ish P. High flow nasal cannula in acute hypercapnic exacerbation of chronic obstructive pulmonary disease: an emerging utility. monaldi [Internet]. 21Jan.2020 [cited 28Feb.2020];90(1). Available from: https://monaldi-archives.org/index.php/macd/article/view/1158