COVID-19(11) Patient(7) Mortality(5) risk(5) blocker(5) outcome(5) ARB(5) hypertension(5) 95% CI(5) SARS-CoV-2(4) intensive care(4) Treatment(4) COVID-19 infection(3) renin-angiotensin-aldosterone system(3) no difference(3) IMPROVE(3) ACEi(3) significant difference(3) System(3) mortality rate(3) Google Scholar(3) inclusion criteria(3) searched(3) renin-angiotensin system(3) angiotensin receptor blocker(3) enzyme(3) articles(3) inhibitor(3) risk of death(3) Cochrane Library(3)