1. Department of Mathematics, Hajjah University, Hajjah, Yemen
2. Department of Mathematics, Dr.Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra 431001, India
3. Department of Mathematics, Hodeidah University, Al-Hudaydah, Yemen
4. Department of Mathematics, Çankaya University, 06790 Etimesgut, Ankara, Turkey
5. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan