Yin, Jie
Wang, Yongxue
Shan, Ying
Li, Yan
Jin, Ying
Pan, Lingya
Article History
Received: 4 December 2018
Accepted: 3 May 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of Peking Union Medical College Hospital.
: The authors declare that they have no competing interests.
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