Arslan N, Yaprak B. The correlation between vitamin D levels and inflammation, as well as the Prognostic Nutritional Index (PNI), in older adults. annalsmedres [Internet]. 2023 Jul. 25 [cited 2024 Jul. 22];30(7):743-7. Available from: http://annalsmedres.org/index.php/aomr/article/view/4460