Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (NMRPF3F0151 andNMRPF3G0161)
Received: 28 February 2019
Accepted: 29 May 2019
First Online: 4 June 2019
Ethics approval and consent to participate
: This study has approved the hospital ethics committees (104A010B, research ethics committee, Chang Gung Medical Foundation Institutional Review Board). Study participants completed an informed consent before beginning the survey. Confidentiality was assured in the consent forms and the participants remained the right to withdraw their participations at any phase of the research process.
: Informed consent was obtained from all participants for publication. All the authors have approved this publication.
: The authors declare that they have no competing interests.