1. Department of Mathematics, Unaizah College of Sciences and Arts, Qassim University, Saudi Arabia
2. Department of Mathematics, Faculty of Science, Sohag University, Sohag 82524, Egypt
3. Université de Sousse, Institut Supérieur d'Informatique et des Techniques de Communication, H. Sousse 4000, Tunisia
4. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
5. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
6. Department of Mathematics, Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Korea