Wang, Yingying
Ming, Jingjing
Guo, Zongyun
Zhang, Wei
Li, Xiang
Zhou, Shengguo
Li, Xia
Ma, Huijuan
Article History
Received: 2 February 2023
Accepted: 10 May 2023
First Online: 8 June 2023
Declarations
:
: This study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of the CDC NCHS Research Ethics Review Board (Protocol #2011-17). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All participants provided written informed consent.
: Not required.
: The authors declare no potential conflicts of interest.