Author Contributions
Haitao Wang, He Zhang, and Ruliang Pan conceived the ideas and designed
the methodology; Hexian Zhang, Hao Pan, and Rong Hou collected the data;
Kang Huang, Songtao Guo, and Pei Zhang analyzed the data; Haitao Wang,
He Zhang, Baoguo Li, and Ruliang Pan led the writing of the manuscript.
All authors contributed critically to the drafts and gave final approval
for publication.