Kaymaz, Serdar, and Sanem Aslihan Aykan. “Optimal Screening Value of Vitamin D Deficiency for Distal Symmetric Polyneuropathy in Patients With Diabetes”. Annals of Medical Research 29, no. 7 (July 25, 2022): 693–697. Accessed April 25, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/4205.