Hauger Carlsen Monica, Frost Andersen Lene, and Hjartåker Anette. “Reproducibility and Feasibility of an Online Self-Administered Food Frequency Questionnaire for Use Among Adult Norwegians”. Food & Nutrition Research 65 (November 11, 2021). Accessed April 24, 2024. https://foodandnutritionresearch.net/index.php/fnr/article/view/7561.