G. Lippi, “The burden of vitamin D deficiency in a mediterranean country without a policy of food fortification”, Acta Biomed, vol. 86, no. 1, pp. 59–62, Apr. 2015, Accessed: Jul. 27, 2024. [Online]. Available: https://mattioli1885journals.com/index.php/actabiomedica/article/view/4243