Funding for this research was provided by:
Mackay Memorial Hospital (MMH 103-54,MMH 104-15,MMH 104-69)
Received: 11 September 2017
Accepted: 18 September 2018
First Online: 11 October 2018
Ethics approval and consent to participate
: This study was approved by Institutional Review Board, MacKay Memorial Hospital, Taipei, Taiwan. Protocol no. 14MMHIS125.
: Not applicable.
: The authors declare that they have no competing interests.
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