1. Department of Mathematics, Gilan-E-Gharb Branch, Islamic Azad University, Gilan-E-Gharb, Iran
2. Department of Mathematics, Ardabil Branch, Islamic Azad University, Ardabil, Iran
3. Institut Supérieur d’Informatique et des Techniques de Communication, Universite de Sousse, H. Sousse 4000, Tunisia
4. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
5. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan