Dogan, Ugur, and Mehmet Tahir Oruc. “Evaluation of Changes in Vitamin B12, Ferritin, Folic Acid, and Thyroid Hormone Levels After Sleeve Gastrectomy”. Annals of Medical Research 25, no. 1 (May 25, 2021): 0018–0021. Accessed May 17, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/1553.