Wang, Xiaowei
Wang, Mingjie
Shao, Shuangshuang
Zhang, Yang
Liu, Siyu
Gao, Yue
Shen, Yuhang
Sun, Pinghui
Article History
Received: 29 August 2018
Accepted: 14 November 2018
First Online: 26 November 2018
Ethics approval and consent to participate
: The ethics were approved by the Ethics Committee of Fuwai Hospital of Chinese Academy of Medical Sciences (project identification code: 2014–574), and written informed consent was obtained from all of the participants before data collection.
: Not applicable.
: The authors declare no conflict of interest.
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