“The Use of Parametric and Nonparametric Methods to Study the Effects of Smoking on High-Density Lipoprotein Cholesterol”. Iraqi Journal of Science 62, no. 4 (April 30, 2021): 1231–1237. Accessed December 22, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2685.