?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Canas&rft.aufirst=LS&rft.au=Canas%2C+LS&rft.volume=3&rft.issue=9&rft.atitle=Early+detection+of+COVID-19+in+the+UK+using+self-reported+symptoms%3A+a+large-scale%2C+prospective%2C+epidemiological+surveillance+study&rft.title=Lancet+Digital+Health&rft.date=1+September+2021&rft.pages=e587-e598&rft.genre=article