The Use of Parametric and Nonparametric Methods to Study the Effects of Smoking on High-Density Lipoprotein Cholesterol. Iraqi Journal of Science [Internet]. 2021 Apr. 30 [cited 2024 Dec. 22];62(4):1231-7. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2685