?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Arum&rft.au=Arum%2C+C&rft.aufirst=C&rft.date=May+2021&rft.atitle=Homelessness%2C+unstable+housing%2C+and+risk+of+HIV+and+hepatitis+C+virus+acquisition+among+people+who+inject+drugs%3A+a+systematic+review+and+meta-analysis&rft.volume=6&rft.pages=e309-e323&rft.title=The+Lancet+Public+Health&rft.issue=5&rft.genre=article