Das, M. , Das, S. , Bhuiyan, A.T., Nath, S.D. , Biswas, R. , Gupta, J.D., Ball, A. , Alam, M.J., Karim, M.H., Nath, R.K. and Saha, A. 2021. Factors affecting the outcome of the usage of high-flow nasal cannula on severe or critically ill COVID-19 patients: a multicentric study from a developing nation. Asian Journal of Medical and Biological Research. 7, 3 (Sep. 2021), 260–272. DOI:https://doi.org/10.3329/ajmbr.v7i3.56136.