Funding for this research was provided by:
Chang Gung Memorial Hospital, Linkou (CORPG3G0171, CMRPG3H0852, and CIRPG3B0014)
Text and Data Mining valid from 2020-05-01
Received: 26 February 2020
Accepted: 22 April 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board of the Chang Gung Memorial Hospital, and the requirement for patients’ informed consent was waived by the institutional review board.
: Not applicable
: The authors declare that they have no competing interests.