1. Department of Mathematics, Tianjin Polytechnic University , Tianjin, China.
2. Department of Healthcare Administration and Medical Informatics, Kaohsiung Medical University , Kaohsiung, Taiwan.
3. Research Center of Nonlinear Analysis and Optimization, Kaohsiung Medical University , Kaohsiung, Taiwan.
4. Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung, Taiwan.
5. Department of Neural Computing, China Medical University , Taichung, Taiwan.
6. Department of Mathematics and Informatics, University “Politehnica” of Bucharest , Bucharest, Romania.