Evaluation of the Smoking Factor in the Blood of Workers in Diyala State Company and its Relationship to Heavy Metals (Lead, Nickel and Copper). Acad. Sci. J. [Internet]. 2023 Jan. 1 [cited 2025 May 13];1(1):107-21. Available from: https://acadscij.uodiyala.edu.iq/index.php/Home/article/view/50