About the Authors

Wu Jie
Lu Ciyong


Affiliation Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China

Deng Xueqing
Wang Hui
Hong Lingyao

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LCY WJ. Performed the experiments: LCY WJ DXQ. Analyzed the data: WJ. Contributed reagents/materials/analysis tools: WH. Wrote the paper: WJ. Academic counseling: HLY.