“…The studies originated from multiple countries, with 13 of coming from institutions located in the USA [20,21,23,[32][33][34][35]38,42,43,45,48,51]. Nineteen studies included only patients admitted in the ICU [20,22,24,25,27,[30][31][32][35][36][37][38][39][43][44][45][46][47]52], five studies included patients admitted in a COVID-19-dedicated HDU [28,29,33,34,42], eight studies included patients who were admitted in both HDU and ICU [21,23,26,40,41,48,49,51], and one study included Emergency Department patients who were later admitted either in the HDU of ICU [50]. Thirty studies included data about patients who received vs. patients who did not receive vasopressors…”