Funding for this research was provided by:
Guangdong Provincial Medical Research Foundation (B2018209)
Received: 18 January 2018
Accepted: 3 April 2018
First Online: 17 April 2018
Ethics approval and consent to participate
: This trial has been approved by the Human Research Ethics Committees of Guangdong Second Provincial General Hospital (2017-FS-032).
: All authors gave consent for publication.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.