Jacobsen, Bjarne Koster, and Hugo Nilsen. “High Education Is Associated With Low Fat and High Fibre, Beta-Carotene and Vitamin C - Computation of Nutrient Intake Based on a Short Food Frequency Questionnaire in 17,265 Men and Women in the Tromsø Study”. Norsk Epidemiologi 10, no. 1 (November 5, 2009). Accessed March 29, 2024. https://www.ntnu.no/ojs/index.php/norepid/article/view/515.