?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.ypmed.2009.11.010&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Loprinzi%2C+Paul&rft.aufirst=Paul&rft.aulast=Loprinzi&rft.issn=0091-7435&rft.title=Preventive+Medicine&rft.issue=3&rft.date=2010&rft.volume=50&rft.atitle=Parental+influences+on+physical+activity+behavior+in+preschool+children&rft.genre=article