Sayed, Mohamed, Ebthal Mahmoud Abozeid, Hoda M. Amin, Naglaa M. Elsayed, Yasser H. Nassar, and Hend A. Elsheimy. 2021. “Non-Alcoholic Fatty Liver and Vitamin D Levels in Extremely Obese Individuals: A Case–Control Study”. Open Access Macedonian Journal of Medical Sciences 9 (B):541-46. https://doi.org/10.3889/oamjms.2021.5976.