2.1. Design and Settings
This was a double-blind randomized clinical trial study that was
performed in Rasool Akram Medical Complex and Firoozgar hospital in
Tehran on 150 patients with COVID-19. The diagnosis of COVID-19 was made
according to the opinion of the relevant physician based on clinical
signs and PCR, paraclinical, or laboratory findings. Both hospitals are
affiliated to the Iran University of Medical Sciences (IUMS) and observe
the same country protocol to treat COVID-19 patients.