Funding for this research was provided by:
Ministry of Health and Welfare (DOH96-NNB-104; DOH97-NNB-1018; DOH98-NNB-1010; DOH99-FDA-6120)
Text and Data Mining valid from 2019-10-17
Received: 25 March 2019
Accepted: 12 September 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The institutional review board of the College of Public Health, National Taiwan University, approved the study. Participants were informed the nature of the study and were guaranteed confidentiality prior to the survey. Afterwards, written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.