COVID RADAR app: Description and validation of population surveillance of symptoms and behavior in relation to COVID-19
Willian van Dijk, Nicholas H. Saadah, Mattijs E. Numans, Jiska J Aardoom, Tobias Bonten, Menno Brandjes, Michelle Brust, Saskia le Cessie, Niels H. Chavannes, Rutger A. Middelburg, Frits R. Rosendaal, Leo G. Visser, Jessica C. Kiefte‐de Jong (2021). COVID RADAR app: Description and validation of population surveillance of symptoms and behavior in relation to COVID-19. PLoS ONE, 16(6), pp. e0253566-e0253566, DOI: 10.1371/journal.pone.0253566.
