The Role of Convalescent Plasma and Tocilizumab in the Management of COVID-19 Infection: A Cohort of 110 Patients from a Tertiary Care Hospital in Oman oleh Faryal Khamis, Ziad Memish, Maher Al Bahrani, Hamed Al Nummani, Dana Al Raisi, Samata Al Dowaiki, Shabnam Chhetri, Fatma Al Fahdi, Maha Al Yahyai, Nenad Pandak, Zakariya Al Bolushi, Zainab Alarimi, Sabria Al Hashmi, Issa Al Salmi, Ibrahim Al-Zakwani