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a The extension of pulmonary endotheliitis (R-test p = 0.031, U test p = 0.029) and b) the evidence of multi-organ involvement (R-test p = 0.026, U test p = 0.006) correlated significantly with COVID-19 associated cause of death (Pearson χ2 and Mann-Whitney tests). COVID-19, coronavirus disease 2019.
