Risk factors for mortality in hospitalized patients with COVID-19: a study in Milan, Italy. Issue 3 (4th March 2021) - Abbattista, Maria; Ciavarella, Alessandro; Capecchi, Marco; Tantardini, Francesca; Gramegna, Andrea; Lombardi, Rosa; Scaramellini, Natalia; Peyvandi, Flora; Martinelli, Ida