Domellöf, Magnus, Inga Thorsdottir, and Ketil Thorstensen. “Health Effects of Different Dietary Iron Intakes: A Systematic Literature Review for the 5th Nordic Nutrition Recommendations”. Food & Nutrition Research00 (July 12, 2013). Accessed July 18, 2019. https://foodandnutritionresearch.net/index.php/fnr/article/view/540.