Comment on: "Beyond Chronological Age: Frailty and Multimorbidity Predict In-hospital Mortality in Patients With Coronavirus Disease 2019". (8th January 2021) - Girard, Noémie; Odille, Geoffrey; Sanchez, Stéphane; Lelarge, Sarah; Mignot, Alexandre; Putot, Sophie; Larosa, Fabrice; Vovelle, Jérémie; Nuss, Valentine; Da Silva, Sofia; Barben, Jérémy; Manckoundia, Patrick; et al.