claim: no effect of corticosteroids in preventing mortality in patients receiving tocilizumab to treat severe covid-19 illness
evidence_1: mortality in tocilizumab-treated patients with covid-19: a systematic review and meta-analysis.", "conclusions: in patients with severe covid-19 receiving tcz due to systemic host-immune inflammatory response syndrome, the use of cs in addition to tcz therapy, showed a beneficial effect in preventing in-hospital mortality.")