Favipiravir Effectiveness and Safety in Hospitalized Moderate-Severe COVID-19 Patients: Observational Prospective Multicenter Investigation in Saudi Arabia oleh Saleh Al-Muhsen, Nouf S. Al-Numair, Narjes Saheb Sharif-Askari, Roaa Basamh, Banan Alyounes, Amjad Jabaan, Fatemeh Saheb Sharif-Askari, Mohammed F. Alosaimi, Fahad Alsohime, Rabih Halwani, Rabih Halwani, Rabih Halwani, Haya Al-Saud, Haya Al-Saud