Funding for this research was provided by:
National Natural Science Foundation of China (61672450)
Received: 24 November 2017
Accepted: 27 December 2018
First Online: 9 January 2019
Ethics approval and consent to participate
: Approval by the Data Protection Committee at the Chinese PLA General Hospital was obtained prior to initiation of the study. Informed consent was waived because of the presence of deidentified data and lack of feasibility of obtaining informed consent from all participants in the experimental dataset. The ethics committee at the Chinese PLA General Hospital ruled that no formal ethics approval was required in this particular case.
: Not applicable.
: The authors declare that they have no competing interests.
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