?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Staff%2C+J&rft.aufirst=J&rft.aulast=Staff&rft.volume=87&rft.date=December+2018&rft.title=Addictive+Behaviors&rft.atitle=Risk+factors+associated+with+early+smoking+onset+in+two+large+birth+cohorts&rft.pages=283-289&rft.issn=1873-6327&rft.genre=article