Oncul, Hasan, Mehmet Fuat Alakus, Mehtap Caglayan, Fatma Yilmaz Oncul, Umut Dag, and Esref Arac. 2021. “Impact of Vitamin D Supplementation on the Ocular Surface in Patients With Vitamin D Deficiency”. Annals of Medical Research 27 (10):2726-30. http://www.annalsmedres.org/index.php/aomr/article/view/989.