Article History
First Online: 2 July 2018
Compliance of Ethical Standards
:
: Sze-Wen Ting, Yi-Cheng Chen, Yu-Huei Huang declare that they have no conflict of interest.
: All authors received no funding for the conduct of this study or the preparation of manuscript. This study was supported by Chang Gung Memorial Hospital, Linkou (CMRPG 1F0061, 1F0062 and MOST 104-2314-B-182A-082).
: The study protocol was approved by the Institutional Review Board (IRB) of the hospital (IRB approval number: 201701282B0).
: The need for informed consent was waived by the IRB in study hospital because of the lack of different interventions among the patient groups and the lack of any breach of patient privacy.