Li, Jingwen
Peng, Peng
Mei, Qi
Xia, Shu
Tian, Yijun
Hu, Liya
Chen, Yuan
Article History
Received: 9 May 2017
Accepted: 20 February 2018
First Online: 3 March 2018
Compliance with ethical standards
: The study was approved by the Ethical Committee of Tongji Hospital. All written informed consent documents were obtained from each participant before the study.
: The authors declare that they have no conflict of interest.