1. Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang, People’s Republic of China
2. Department of Mathematics, El Obour Institutes, Cairo, Egypt
3. Department of Mathematics, Science Faculty, Firat University, Elazig, Turkey
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
5. Department of Basic Science, Higher Technological Institute, El Sharqia, Egypt
6. Department of Mathematics, College of Science, King Saud University, Riyadh, Saudi Arabia