Dogan U, Tahir Oruc M. Evaluation of changes in vitamin B12, ferritin, folic acid, and thyroid hormone levels after sleeve gastrectomy . annalsmedres [Internet]. 2021 May 25 [cited 2024 May 17];25(1):0018-21. Available from: http://www.annalsmedres.org/index.php/aomr/article/view/1553