?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Louca%2C+P&rft.aulast=Louca&rft.aufirst=P&rft.atitle=Modest+effects+of+dietary+supplements+during+the+COVID-19+pandemic%3A+Insights+from+445+850+users+of+the+COVID-19+Symptom+Study+app&rft.title=BMJ+Nutrition%2C+Prevention+and+Health&rft.volume=4&rft.date=June+2021&rft.genre=article