Despite trend toward a negative association between impaired endothelial reactivity and time between first symptoms to ICU admission, this relationship did not reach statistical significance neither for COVID-19 ( P = 0.06) nor NCBP patients ( P = 0.63) (Additional file 1: Fig.
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Impaired skin microvascular endothelial reactivity in critically ill COVID-19 patients.
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0.0600
0.0600