Chen, Cheng
Winterstein, Almut G.
Fillingim, Roger B.
Wei, Yu-Jung http://orcid.org/0000-0001-8861-6907
Article History
Received: 11 January 2019
Accepted: 26 April 2019
First Online: 24 May 2019
Ethics approval and consent to participate
: The National Center for Health Statistics Ethics Review Board approved the NHANES study and documented consent was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.
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