COVID-19(21) SARS-CoV-2(12) pandemic(8) reported(7) Treatment(7) Patient(7) Comorbidity(6) Infection(6) coronavirus(5) Evidence(5) COVID-19 pandemic(5) patients(5) investigated(4) Potential(4) with COVID-19(4) conducted(4) virus(4) oxidative stress(4) caused(4) COVID-19 patients(4) disease(4) outbreak(4) therapeutic(4) COVID-19 patient(4) Effect(4) effective(4) individual(4) progression(4) Factors(4) Symptom(4)