Characterisation of 22445 patients attending UK emergency departments with suspected COVID-19 infection: Observational cohort study. - Goodacre S; Thomas B; Lee E; Sutton L; Loban A; Waterhouse S; Simmonds R; Biggs K; Marincowitz C; Schutter J; Connelly S; Sheldon E; et al. (PloS one, 2020)