Øverby Nina Cecilie, Johannesen Elisabeth, Jensen Grete, Skjævesland Anne-Kirsti, and Haugen Margaretha. “Test-Retest Reliability and Validity of a Web-Based Food-Frequency Questionnaire for Adolescents Aged 13-14 to Be Used in the Norwegian Mother and Child Cohort Study (MoBa)”. Food & Nutrition Research00 (October 17, 2014). Accessed December 8, 2022. https://foodandnutritionresearch.net/index.php/fnr/article/view/657.