“Study the Relationship Between Selenium , Vitamin B6 , B12 and Hyperhomocysteine  in Patients With Cardiovascular Disease in Thi-Qar Governorate”. University of Thi-Qar Journal of Science, vol. 10, no. 1, June 2023, pp. 95-100, https://doi.org/10.32792/utq/utjsci/v10i1.957.