?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Lut&rft.au=Lut%2C+I&rft.aufirst=I&rft.date=11+February+2021&rft.issue=2&rft.atitle=Health+outcomes%2C+healthcare+use+and+development+in+children+born+into+or+growing+up+in+single-parent+households%3A+a+systematic+review+study+protocol&rft.volume=11&rft.title=BMJ+Open&rft.genre=article