El-Husseini, Zain alabdin Aboud Kazem, and Ahmad N. Flaih. 2019. “Estimating Mediation and Direct Effects of the Multiple Model With Application Kidney”. Journal of Al-Qadisiyah for Computer Science and Mathematics 11 (4):Stat Page 1-20. https://doi.org/10.29304/jqcm.2019.11.4.617.