Funding for this research was provided by:
Health Promotion Administration, Ministry of Health and Welfare of Taiwan (DOH101-HP-1406)
Received: 17 April 2018
Accepted: 17 April 2019
First Online: 7 May 2019
Ethics approval and consent to participate
: The study protocol and informed consent procedure were approved by the Research Ethics Committee of National Taiwan University. The IRB docket number is 201303HS011. Verbal consent was obtained from all study participants. The use of verbal consent was approved by the ethical review. All participants were also informed about the following issues: (1) the use of aggregated and anonymized personal data for scientific purposes which include publication, (2) no list of respondents was retained, and (3) the confidentiality was maintained through the use of unique identifiers for all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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