?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Sheffield%2C+JG&rft.aufirst=JG&rft.aulast=Sheffield&rft.degree=Doctoral&rft.inst=UCL+(University+College+London)&rft.tpages=292&rft.title=Externalising+behaviour+and+the+neural+correlates+of+reward+in+adolescence&rft.date=28+June+2017