?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ala-Mursula&rft.au=Ala-Mursula%2C+L.&rft.aufirst=L.&rft.date=March+2004&rft.issn=1470-7926&rft.issue=3&rft.atitle=Effect+of+employee+worktime+control+on+health%3A+a+prospective+cohort+study&rft.volume=61&rft.title=Occupational+and+Environmental+Medicine&rft.pages=254-261&rft.genre=article