Zhang, Xiao-dan
Cui, Zhao
Zhang, Mu-fan
Wang, Jia
Zhang, Yi-miao
Qu, Zhen
Wang, Xin
Huang, Jing
Wang, Fang
Meng, Li-qiang
Cheng, Xu-yang
Wang, Su-xia
Liu, Gang
Zhao, Ming-hui
Article History
Received: 2 February 2018
Accepted: 13 August 2018
First Online: 28 August 2018
Ethics approval and consent to participate
: The research was in compliance of the Declaration of Helsinki and approved by the ethics committee of Peking University First Hospital. All participants gave written contents for data collection.
: Not applicable.
: The authors declare that they have no competing interests.
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