Zhang, Hongmin
Wang, Xiaoting
Chen, Xiukai
Zhang, Qing
Liu, Dawei http://orcid.org/0000-0002-7514-3087
Article History
Received: 18 April 2018
Accepted: 4 July 2018
First Online: 7 August 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Peking Union Medical College Hospital, Beijing, China. Written informed consent was obtained from the next of kin of each patient.
: Not applicable.
: The authors declare that they have no competing interests.
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