Received: 24 August 2018
Accepted: 26 July 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: The current study protocol was approved by the Institutional Review Board for Human Studies of the Chang Gung Memorial Hospital (approval no. 201800032B1), which waived the need for patient informed consent because the study utilized secondary de-identified information.
: Not applicable.
: The authors declare that they have no competing interests.