Ng, Chip-Jin
You, Shih-Hao
Wu, I-Lin
Weng, Yi-Ming
Chaou, Chung-Hsien
Chien, Cheng-Yu
Seak, Chen-June
Article History
Received: 30 April 2018
Accepted: 9 August 2018
First Online: 29 August 2018
Ethics approval and consent to participate
: The study was approved by the Chang Gung Memorial Hospital (CGMH) Institutional Review Board and was exempted from requiring informed consent and full committee review.
: This study was a retrospective cohort study. Thus, obtaining consent from a patient was waived by the institutional review board.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.