Comparing SARS-CoV-2 and influenza A(H1N1)pdm09-infected patients requiring ECMO – A single-centre, retrospective observational cohort experience. Issue 4 (April 2021) - Charlton, Matthew; Dashey, Susan; Stubbs, Abigail; Lai, Florence YL; Bird, Paul W; Badhwar, Vinay; Tang, Julian W