Funding for this research was provided by:
National Natural Science Foundation of China (81470369)
Received: 29 November 2018
Accepted: 25 April 2019
First Online: 7 May 2019
Ethics approval and consent to participate
: The study has been approved by the Institutional Review Board of Queen Mary Hospital (UW 05-269 T/932), and written informed consent has been obtained from patients for the participation of this study.
: We have obtained consents from patients for the publication of this report and any accompanying data or images.
: The authors declare that they have no competing interests.
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