Funding for this research was provided by:
National Natural Science Foundation of China (81602585)
Guangdong Science and Technology Department (2017A030313522)
Fundamental Research Funds for the Central Universities (18ykpy13)
Kelin Nova Program of The First Affiliated Hospital of Sun Yat-sen University
Received: 11 March 2019
Accepted: 27 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: Not applicable.
: All authors agree to submit this manuscript and declare no competing of interest related to this work.
: The authors declare that they have no competing interests.