Increased CD4/CD8 ratio as a risk factor for critical illness in coronavirus disease 2019 (COVID-19): a retrospective multicentre study.
Carlo PallottoLorenzo Roberto SuardiSara EspertiRoberto TarquiniElisa GrifoniSimone MeiniAlice ValorianiStefania Di MartinoFrancesco CeiEleonora SistiFiorella PianiAnnarita BottaElena SalomoniFilippo BaragliPierluigi BlancPublished in: Infectious diseases (London, England) (2020)