National Natural Science Foundation of China: 31572005. Educational Commission of Hunan Province of China: 15A090. Hunan Provincial Postgraduate Research and Innovation Project of China: CX2017B350.
This work was funded by the National Natural Science Foundation of China (31572005), the Educational Commission of Hunan Province of China (15A090), and the Hunan Provincial Postgraduate Research and Innovation Project of China (CX2017B350). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.