Wang, Ke
Yu, Xiaohong
Li, Yi
Guo, Yun
Ge, Lin
Pu, Fangfang
Ma, Xinying
Cui, Wenjing
Marrota, Francesco
He, Fang
Li, Ming
Article History
First Online: 5 July 2018
Compliance with Ethical Standards
: The study was conducted in accordance with the guidelines of the Declaration of Helsinki and approved by the Ethical Committee of West China School of Public Health on 11 November 2016. Informed consent was obtained from all patients included in the study.
: The authors declare that they have no conflicts of interest.