1. Department of Medical Research, China Medical University Hospital, China Medical University (Taiwan), Taichung, Taiwan; and Department of Computer Science and Information Engineering, Asia University, Taichung, Taiwan; and Department of Mathematics, Aligarh Muslim University, Aligarh-202002, India
2. Department of Mathematics, Dhamar University, Dhamar, Yemen
3. Math and Science Department, Community College of Qatar, P.O.Box 7344, Doha, Qatar