Neither earlier nor late tocilizumab improved outcomes in the intensive care unit patients with COVID-19 in a retrospective cohort study. Issue 1 (30th October 2020) - Moiseev, Sergey; Avdeev, Sergey; Tao, Ekaterina; Brovko, Michail; Bulanov, Nikolay; Zykova, Anastasiia; Akulkina, Larisa; Smirnova, Irina; Fomin, Victor