Frailty assessment for COVID-19 follow-up: a prospective cohort study oleh Christophe Von Garnier, Manuela Funke-Chambour, Lise Piquilloud, Marco Mancinetti, Pierre-Olivier Bridevaux, Christian Garzoni, Martin H Brutsche, Ilena Müller, Anja Renner, Christian Clarenbach, Alexandra Lenoir, Bruno Naccini, Sebastian Ott, Maura Prella, Yok-Ai Que, Paola Marina Soccal, Thomas K Geiser, Sabina Guler