Text and Data Mining valid from 2019-03-12
Received: 7 January 2019
Accepted: 5 March 2019
First Online: 12 March 2019
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of NTUH (IRB No. 201707058RINB). Both oral and written informed consent was waived because of the retrospective study design and the research posing minimal risk.
: Not applicable.
: The authors declare that they have no competing interests.
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