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Authors
Li, Sen http://orcid.org/0000-0003-4496-5050
Wen, Xi
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Funding
Funding for this research was provided by:
Beijing University of Chinese Medicine
National Institutes of Health
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Article History
Received: 19 December 2016
Accepted: 30 October 2017
First Online: 7 November 2017
Ethics approval and consent to participate
: Data analyzed in this study were obtained from NHANES. Protocols involved were approved by the National Center for Health Statistics (NCHS) Research Ethics Review Board (ERB), and consent from all participants was documented. This study is a secondary data analysis using existing, de-identified, publicly available NHANES data, and no further ethical approval is required according to US Health & Human Services (HHS)’ regulations (available fromExternalRef removed, accessed October 2017) [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.
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