Received: 16 January 2018
Accepted: 30 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: This study was approved by the Human Investigation Committee of the Institutional Review Board (IRB) of Chang-Gung Memorial Hospital; IRB number: 104-5591B, and compliant with the principles set forth by the Declaration of Helsinki Principles. All the data obtained was anonymized. The need for consent was waived by the IRB of our hospital.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interests.