Xu, Chi
Chai, Wei
Chen, Ji-Ying
Article History
Received: 30 January 2019
Accepted: 4 June 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the General Hospital of People’s Liberation Army and in accordance with the standards of the National Research Council. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests