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http://journals.cambridge.org/action/displayAbstract?aid=572004
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PAL Ashfield-Watt,
AA Welch,
NE Day
and SA Bingham
(2004).
Is ‘five-a-day’ an effective way of increasing fruit and vegetable intakes?. Public Health Nutrition, 7
,
pp 257-261
doi:10.1079/PHN2003524