COVID-19(31) SARS-CoV-2(14) Zinc(13) COVID-19 patient(10) the patient(9) micronutrients(8) oxidative stress(8) serum(8) COVID-19 patients(8) Selenium(8) trace elements(7) zinc.(7) reported(7) indicated(7) two groups(6) patients with COVID-19(6) Mortality(6) randomized clinical trial(6) Infection(6) Patient(6) disease severity(6) immune system(5) was performed(5) therapy(5) evaluate the effect(5) two group(5) had no(5) investigated(5) glutathione(4) SELENOP(4)