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http://journals.cambridge.org/action/displayAbstract?aid=3102948
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Laima Brazionis,
Kevin Rowley,
Catherine Itsiopoulos
and Kerin O'Dea
(2009).
Plasma carotenoids and diabetic retinopathy. British Journal of Nutrition, 101
,
pp 270-277
doi:10.1017/S0007114508006545