Article History
Received: 1 January 2019
Accepted: 19 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: An ethics statement was not required for this work. Data used in the analysis were anonymized. The NHANES III database was open to the public and did not require any ethical or administrative permission.
: Not Applicable.
: The authors declared no conflict of interest.