Author contributions
Collecting literature: Zhenhua Mai, Zilong Yang, Hongpeng Chen, Shuting Cai, Wangwang Hu; Drawing graphs and tables and Data analysis: Xiaoyan Wang; Writing the article: Zhenhua Mai, Yaying Tan, Yang Zhu; Modifying the article: Fenghua Ding, Liehua Deng. All authors have read and approved the final manuscript.