Naude, Celeste. “Would an Increase in Vegetable and Fruit Intake Help to Reduce the Burden of Nutrition-Related Disease in South Africa? An Umbrella Review of the Evidence”. South African Journal of Clinical Nutrition 26, no. 3 (May 26, 2013): 104-114. Accessed September 15, 2019. http://sajcn.co.za/index.php/SAJCN/article/view/719.