Funding for this research was provided by:
Department of Health, Taiwan (DOH98-DC-1005)
Text and Data Mining valid from 2018-07-31
Received: 14 May 2018
Accepted: 24 July 2018
First Online: 31 July 2018
Ethics approval and consent to participate
: The study was approved by the institutional review board of National Taiwan University Hospital and the requirement for written consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
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