Fig. 2From: Impact of upper and lower respiratory symptoms on COVID-19 outcomes: a multicenter retrospective cohort studyComparison of chest images among the four groups. a, b Proportions of patients with ground-glass opacities and infiltrative shadows on chest X-ray images among the four groups. c, d Proportions of patients with ground-glass opacities and infiltrative shadows on chest computed tomography scans among four the groupsBack to article page