“Study the Relationship Between Selenium , Vitamin B6 , B12 and Hyperhomocysteine  in Patients With Cardiovascular Disease in Thi-Qar Governorate”. 2023. University of Thi-Qar Journal of Science 10 (1): 95-100. https://doi.org/10.32792/utq/utjsci/v10i1.957.