ACE2 and COVID-19: Ramos Ramos SG SG da Cruz Rattis da Cruz Rattis BA BA Ottaviani Ottaviani G G Celes Celes MRN MRN Dias Dias EP EP ACE2 down-regulation may act as a transient molecular disease causing RAAS dysregulation and tissue damage in the microcirculatory environment among COVID-19 patients ACE2 down-regulation may act as a transient molecular disease causing RAAS dysregulation and tissue damage in the microcirculatory environment among COVID-19 patients Am J Pathol Am J Pathol 2021 2021 191 191 7 7 1154 1154 64 64 10.1016/j.ajpath.2021.04.010 10.1016/j.ajpath.2021.04.010 supplied-pmid 33964216?