1. Department of Applied Mathematics, Pukyong National University, Busan 48513, Republic of Korea.
2. Anheuser-Bush School of Business, Harris-Stowe State University, St. Louis, Missouri 63103, U.S.A.
3. Department of Mathematics and Statistics, University of Victoria, Victoria, British Columbia V8W 3R4, Canada
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
5. Center for Converging Humanities, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
6. Department of Applied Mathematics, Chung Yuan Christian University, Chung-Li, Taoyuan City 320314, Taiwan
7. Department of Mathematics and Informatics, Azerbaijan University, 71 Jeyhun Hajibeyli Street, AZ1007 Baku, Azerbaijan