1. Department of Mathematics and Physics, Mianyang Teachers' College, Mianyang, Sichuan, People's Republic of China
2. University of Massachusetts Medical School, Worcester, MA, USA
3. School of Mathematical Science, Shanghai Jiao Tong University, Shanghai, People's Republic of China
4. School of Science and Technology, University of Sanya, Sanya, Hainan, People's Republic of China
5. Center for Mathematical Research, University of Sanya, Sanya, Hainan, People's Republic of China
6. Academician Guoliang Chen Team Innovation Center, University of Sanya, Sanya, Hainan, People's Republic of China
7. Academician Chunming Rong Workstation, University of Sanya, Sanya, Hainan, People's Republic of China