Funding for this research was provided by:
National Key Research and Development Program of China (2018YFC1200102)
Key Research and Development Program of Hainan Province (ZDYF2018113)
Beijing Municipal Science &Technology Commission (Z171100001017118)
Received: 25 August 2019
Accepted: 11 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The institutional review boards at the Hainan general hospital approved the study protocol.
: Written informed consent was obtained from the patient’s direct relative for publication of this study. A copy of the written consent is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.