Jonsson , K., M. Barman, H. Brekke, B. Hesselmar, S. Johansen, A.- .S. Sandberg, and A. Wold. “Late Introduction of Fish and Eggs Is Associated With Increased Risk of Allergy Development – Results from the FARMFLORA Birth Cohort”. Food & Nutrition Research, vol. 61, Nov. 2017, https://foodandnutritionresearch.net/index.php/fnr/article/view/1179.