Funding for this research was provided by:
Guangzhou Science, Technology and Innovation Commission (201707010460)
Guangdong science and technology project (2016A020215137)
Received: 29 October 2018
Accepted: 22 May 2019
First Online: 6 June 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of The First Affiliated Hospital of Guangzhou University of Chinese Medicine and performed in accordance with the ethical standards of the 1964 Declaration of Helsinki as revised in 2000. All patients provided their informed consent for surgery.
: Not applicable
: The authors declare that they have no competing interests.