Silte Karamanlioglu, D., G. Ozturk, and P. Akpinar. “Does the Level of Vitamin D Influence Pain Intensity, Functional Ability, and Quality of Life in Individuals With Chronic Low Back Pain?”. Annals of Medical Research, vol. 31, no. 10, Oct. 2024, pp. 816-22, http://annalsmedres.org/index.php/aomr/article/view/4765.