Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST105-2628-B-182A-008-MY3)
Chang Gung Memorial Hospital, Linkou (CORPG3G0171, CMRPG2G0231)
Received: 15 November 2017
Accepted: 29 January 2018
First Online: 5 February 2018
Ethics approval and consent to participate
: The retrospective review of medical records for this study was approved by the Institutional Review Board (201600713B0).
: Not applicable.
: The authors declare that they have no competing interests.
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