The safety and effectiveness of tocilizumab in older adult critically ill patients with COVID-19: a multicenter, cohort study oleh Ghazwa B. Korayem, Ohoud Aljuhani, Ali F. Altebainawi, Abdulrahman I. Al Shaya, Lina I. Alnajjar, Abdulrahman Alissa, Mohammed Aldhaeefi, Raed Kensara, Hessa Al Muqati, Abdulmohsen Alhuwahmel, Omar Alhuthaili, Ramesh Vishwakarma, Namareq Aldardeer, Khalid Eljaaly, Aisha Alharbi, Shmeylan Al Harbi, Abdulmalik Al Katheri, Abdulkareem M. Al Bekairy, Ahmed Aljedai, Khalid Al Sulaiman