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Authors
Wolffenbuttel, Bruce H. R.
Heiner-Fokkema, M. Rebecca
Green, Ralph
Gans, Rijk O. B.
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Article History
Received: 3 July 2020
Accepted: 1 September 2020
First Online: 9 October 2020
Ethics approval and consent to participate
: The survey protocol was approved by the Research Ethics Review Board of the National Center for Health Statistics (), and NHANES has obtained written informed consent from all participants.
: Not applicable
: The authors declare that they have no competing interests.
