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Correlations of numbers of lymphocyte and HE4 (A), and CRP and biomarkers HE4 (B), CYFRA21‐1 (C), CEA (D), CA125 (E), CA153 (F), SCC (G) and NSE (H) in COVID‐19 patients. A Pearson correlation analysis was used. CEA, carcinoembryonic antigen; COVID‐19, coronavirus disease 2019; CYFRA21‐1, cytokeratin‐19 fragment; HE4, Human epididymis protein 4; NSE, neuron‐specific enolase; SSC, squamous cell carcinoma antigen
