Text and Data Mining valid from 2018-08-21
Received: 28 May 2018
Accepted: 8 August 2018
First Online: 21 August 2018
Compliance with ethical standards
: The authors declared that they have no conflict of interest.
: Ethical approval was approved by committee of the National Cheng Kung University Hospital (Taiwan) (IRB number B-ER-104-097) and Changhua Christian Hospital (Taiwan) (IRB number 150711). All procedures performed involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The authors have full control of all primary data, and they agree to allow the journal to review their data if requested.
: Informed consent was obtained from all individual participants included in the study.