Contributorship:
Dr. Yu-Jen Wei: acquisition of data and drafting of the manuscript;
Ying-Tzu Ju: acquisition and
analysis of data; Dr. Yung-Chieh Lin: research conception and design;
Dr. Chung-Dann Kan: analysis and interpretation of data; Dr. Min-Ling
Hsieh: acquisition and analysis of data; Dr. Jieh-Neng Wang: conception
and design, analysis and interpretation of data, and final approval of
the published version.
Ethics: The study protocol was approved by the Institutional
Review Board (protocol code A-ER-109-137) in National Cheng Kung
University Hospital.
Funding: This research was supported by intramural grant
NCKUH-11105003 from National Cheng Kung University Hospital. The funds
aided in the fees required for the data analysis, English editing, and
publication process.
Competing interests: None of the authors have any competing
interests.