About the Authors

Liu Xuemei

Affiliation Chinese Journal of Evidence-Based Medicine, West China Periodicals Press, West China Hospital of Sichuan University, Chengdu, China

Li Youping

yzmylab@hotmail.com

Affiliation Chinese Evidence-Based Medicine Center, West China Hospital of Sichuan University, Chengdu, China

Yin Senlin

Affiliation West China School of Medicine of Sichuan University, Chengdu, China

Song Shangqi

Affiliation West China School of Medicine of Sichuan University, Chengdu, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LX LY. Performed the experiments: LX YS SS. Analyzed the data: LX YS SS. Contributed reagents/materials/analysis tools: LX YS. Wrote the paper: LX LY.