1. Department of Mathematics, Minhaj University of Lahore, Pakistan
2. Department of Mathematics and Sciences, College of Humanities and Sciences, Prince Sultan University, Riyadh, Saudi Arabia
3. Department of Mathematics, University of Sargodha, Pakistan
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, ROC
5. Department of Mathematics, Faculty of Science, The Hashemite University, Zarqa, Jordan