• COVID-19 and risk factors for severe disease – a rapid review, 2nd update 

      Flodgren, Gerd Monika; Vestrheim, Didrik Frimann; Brurberg, Kjetil Gundro (Research report, 2020)
      Key message This rapid review is an update of a version published 14th of April, 2020. In this review update we excluded studies that only reported results from univariate analyses, and studies with small sample sizes ...