Funding for this research was provided by:
Chang Gung Memorial Hospital (CDRPG8H0012)
Received: 17 April 2019
Accepted: 30 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: This study was approved by the institutional review board (IRB) of the Kaohsiung Chang Gung Memorial Hospital with a reference number: 201800742B0. According to IRB regulations, the need for informed consent was waived.
: Not Applicable
: The authors declare that they have no competing interests.