Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2016A030313817)
Science and Technology Program of Guangzhou (201704020217)
In-Hospital Training Project of the National Natural Science Foundation of Guangdong Women and Children Hospital (YN2017G10)
Received: 4 September 2020
Accepted: 24 February 2021
First Online: 29 March 2021
: This study was approved by the Ethics Committee of Guangdong Women and Children Hospital and has been performed in accordance with the principles of Declaration of Helsinki.
: Not applicable.
: The authors have no conflict of interest to declare.