Funding for this research was provided by:
the Department of Health, Taipei City Government (10501-62-051)
Received: 22 January 2018
Accepted: 16 April 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The study protocol and informed consent procedure were approved by the Institutional Review Board of Taipei city hospital (TCHIRB-10409114). The investigation was carried out in accordance with the Declaration of Helsinki. Written informed consent was obtained from each participant prior to study initiation.
: Not applicable.
: The authors declare that they have no competing interests.
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