?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=James+P&rft.au=Reynolds%2C+James+P&rft.aulast=Reynolds&rft.volume=18&rft.title=PLoS+Medicine&rft.atitle=Impact+of+decreasing+the+proportion+of+higher+energy+foods+and+reducing+portion+sizes+on+food+purchased+in+worksite+cafeterias%3A+A+stepped-wedge+randomised+controlled+trial&rft.issue=9&rft.date=2021&rft.genre=article