Sevimli, Resit, Mehmet Esref Encan, Semih Eriten, Okan Aslanturk, and Yunus Oklu. “Relation of Vitamin D Levels With Sunlight, Genetics and Nutrition”. Annals of Medical Research 26, no. 7 (May 25, 2021): 1141–1144. Accessed May 21, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/1309.