Funding for this research was provided by:
Natural Science Foundation of China (81873327, 81904226)
Received: 29 March 2021
Accepted: 6 May 2021
First Online: 20 May 2021
: This study was conducted in agreement with the Declaration of Helsinki and its later amendments or comparable ethical standards and had been approved by the ethics board of The First Affiliated Hospital of Guangzhou University of Chinese Medicine (No: Y《2019》118).
: Not applicable
: The authors declare that they have no competing interests.