Sun, Hongxiao
Liu, Yuhai
Song, Bo
Cui, Xiaowen
Luo, Gang
Pan, Silin
Funding for this research was provided by:
National Natural Science Foundation of China (81770316)
Qingdao Science and Technology Plan (20-3-4-47-nsh)
Shandong Taishan Scholarship (2018)
Article History
Received: 17 February 2021
Accepted: 27 May 2021
First Online: 16 June 2021
Declarations
:
: The study was conducted in accordance with the Declaration of Helsinki and approved by the local ethics committee of Qingdao Women and Children’s Hospital (No. QFELL-KY-2019-64). All participants’ guardians signed the informed consent.
: Not applicable.
: The authors declare that they have no competing interests.