Biomarkers of cytokine storm as red flags for severe and fatal COVID-19 cases: A living systematic review and meta-analysis. oleh Ana Karla G Melo, Keilla M Milby, Ana Luiza M A Caparroz, Ana Carolina P N Pinto, Rodolfo R P Santos, Aline P Rocha, Gilda A Ferreira, Viviane A Souza, Lilian D A Valadares, Rejane M R A Vieira, Gecilmara S Pileggi, Virgínia F M Trevisani