Funding for this research was provided by:
Chang Gung Memorial Hospital (CMRPG3B0502, CMRPG3B0503, CMRPG3B0501)
Received: 8 March 2020
Accepted: 5 November 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: The NCHS Research Ethics Review Board reviewed and approved NHANES, and all survey participants provided written informed consent. Therefore, no further ethical approval and informed consent were required.
: Not applicable.
: The authors have neither conflicts of interest to disclose nor competing interests to declare.