?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Freckelton%2C+Ian&rft.aufirst=Ian&rft.aulast=Freckelton&rft.issue=2&rft.date=1+March+2021&rft.volume=28&rft.atitle=Human+Challenge+Trials%3A+Ethical+and+Legal+Issues+for+COVID-19+Research&rft.issn=1320-159X&rft.title=Journal+of+Law+and+Medicine&rft.genre=article