Funding for this research was provided by:
Chang Gung Memorial Hospital, Linkou (CMRPG3F1851)
Ministry of Science and Technology, Taiwan (MOST 106-2813-C-182A-001-B)
Medical Foundation in Memory of Dr. Deh-Lin Cheng
Received: 15 October 2018
Accepted: 26 April 2019
First Online: 10 May 2019
Ethics approval and consent to participate
: This study was approved by Institutional Reviewing Board of Chang Gung Memorial Hospital (reference No: 201600590B0) and this was a retrospective study so the consent to participate was waivered by the local ethical review board.
: Not applicable.
: The authors declare that they have no competing interests.
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