COVID-19(18) Patient(14) pharmacokinetic(14) intravenous(11) Efficacy(11) clinically(11) severe COVID-19(11) Remdesivir(11) Concentration(11) Treatment(10) dose(10) coronavirus disease(10) SARS-CoV-2(9) investigated(8) Antiviral(8) Evidence(8) Result(7) fixed(7) enzyme(7) Dosing(7) country(7) Analysis(7) inhibitor(7) administration(7) IMPROVE(7) drug-drug interaction(7) parameter(7) linear(7) acute respiratory syndrome(7) Tocilizumab(7)