1. Institute for Computational and Modeling Science, National Tsing Hua University, Taiwan
2. Division of Applied Mathematics, Thu Dau Mot University, Binh Duong Province, Vietnam
3. Department of Medical Research, CMU Hospital, China Medical University, 40402 Taichung, Taiwan
4. Department of Mathematics, Cankaya University, 06790 Etimesgut, Ankara, Turkey