Murto, Tiina, Agneta Yngve, Agneta Skoog Svanberg, Signe Altmäe, Andres Salumets, Kjell Wånggren, and Anneli Stavreus-Evers. “Compliance to the Recommended Use of Folic Acid Supplements for Women in Sweden Is Higher Among Those under Treatment for Infertility Than Among Fertile Controls and Is Also Related to Socioeconomic Status and Lifestyle”. Food & Nutrition Research 610 (June 9, 2017). Accessed September 20, 2020. https://foodandnutritionresearch.net/index.php/fnr/article/view/1210.