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Authors
Zeng, Mengru
Liu, Yu
Liu, Fuyou
Peng, Youming
Sun, Lin
Xiao, Li
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Article History
Received: 9 February 2020
Accepted: 23 March 2020
First Online: 13 May 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: NHANES was approved by the NCHS Research Ethics Review Board (ERB) and all participants provided written informed consent. The data of ERB approval can found at the website, ExternalRef removed. The approval numbers are protocol #98–12 for NHANES 1999–2004 and protocol #2005–06 for NHANES 2005–2006. Given it was an analysis of anonymous data, the Central South University Institutional Review Board waived the need for reviewing the study.
: All participants provided written informed consent in the NHANES.
