Radiographic findings in 240 patients with COVID-19 pneumonia: time-dependence after the onset of symptoms.

Although the two cohorts are not directly comparable due to different selection criteria and different diagnostic methods, we observed a decreasing trend in the rate of negative CXR through the different time intervals.

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Consolidation was less frequent but, in agreement with other study observations, showed an increasing trend over time [ 16 , 23 ].

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