Firdaus, H., N. A. Khan, M. Reza, M. A. Khan, G. Krishnan, N. A. Razak, A. Verma, M. Shameem, and R. Bhargava. “Clinicoepidemiological Profile and Outcome in Patients of Covid 19 With Normal Chest X-Ray: Study of 51 Patients”. International Journal of Research in Medical Sciences, vol. 9, no. 1, Dec. 2020, pp. 181-5, doi:10.18203/2320-6012.ijrms20205840.