Inpatient COVID-19 mortality has reduced over time: Results from an observational cohort. - Bechman K; Yates M; Mann K; Nagra D; Smith LJ; Rutherford AI; Patel A; Periselneris J; Walder D; Dobson RJB; Kraljevic Z; Teo JHT; et al. (PloS one, 2022)