Text and Data Mining valid from 2018-04-23
Received: 14 December 2017
Accepted: 5 April 2018
First Online: 23 April 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Boards of Chi-Mei Medical Center (10406–003) and TzuChi Hospital (104–67-B).
: The authors declare that they have no competing interests.
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