CXR severity scores of COVID 19 infection in Sri Lanka: findings of a multicenter study during the first wave of the pandemic
U. A. Liyanage,
K. Abeywardana,
D. P. A. Gunasekara,
P. V. R. De Mel,
A. R. M. S. Ranathunga,
K. Lakmal,
S. H. Palihawadana,
S. H. De Silva Weliange
