1. School of Mathematics and Information Science, Henan Polytechnic University, Jiaozuo 454000, P. R. China
2. Department of Mathematics, University of Management and Technology, Lahore, Pakistan
3. Department of Mathematics, Namal University, Talagang Road, Mianwali 42250, Pakistan
4. Department of Computer Engineering, Biruni University, 34025 Istanbul, Turkey
5. Department of Mathematics, Science Faculty, Firat University, 23119 Elazig, Turkey
6. Department of Medical Research, China Medical University Hospital, Taichung, Taiwan