Mizrak, Soycan, and Ali Volkan Ozdemir. “Evaluation of Seasonal Variation of Vitamin D Levels According to Demographic Criteria”. Annals of Medical Research 27, no. 4 (May 25, 2021): 1179–1182. Accessed December 23, 2024. http://annalsmedres.org/index.php/aomr/article/view/710.