1. Department of mathematics and statistics, Faculty of basic and applied sciences, International Islamic University, Islamabad, Pakistan
2. Faculty of Medicine and Health Sciences, Gent University, 9000 Gent, Belgium
3. Mathematics and its Applications in Life Sciences Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam