Clinical Trial Protocol Iranian Registry of Clinical Trials 16 november 2020 Stopcivir (Zataria multiflora Boiss+ Alium Sativum+ Heracleum persicum+ Satureja hortensis+ Dianthus+ Foeniculum vulgare+ opium) syrup on length of hospitalization in patients with COVID-19 #Stopcivir @Javaher_Alhayat