Corrigendum to 'detection of SARS-CoV-2 N-antigen in blood during acute COVID-19 provides a sensitive new marker and new testing alternatives'. (November 2021) - Le Hingrat, Quentin; Visseaux, Benoit; Laouenan, Cédric; Tubiana, Sarah; Bouadma, Lila; Yazdanpanah, Yazdan; Duval, Xavier; Burdet, Charles; Ichou, Houria; Damond, Florence; Bertine, Mélanie; Benmalek, Nabil; et al.