Letter to the Editor: Premorbid Frailty is a better Prognostic Indicator than Age in Oldest-Old Hospitalized with COVID-19.

Piers R, Janssens W, Cobbaert K, Pattyn I, Westhovens I, Martens H, Van Puyvelde K, Maertens S, Guyssens V, Baeyens H, Buyck G, De Raes E, van Leeuwen ML, Mouton V, Dedecker D, Deschepper E, Van Braeckel E, Benoit D, Van Den Noortgate N. Letter to the Editor: Premorbid Frailty is a better Prognostic Indicator than Age in Oldest-Old Hospitalized with COVID-19. J Am Med Dir Assoc. 2021 Mar;22(3):514-516. doi: 10.1016/j.jamda.2021.01.059. Epub 2021 Jan 18.