Funding for this research was provided by:
Chang Gung Memorial Hospital, Linkou (CMRPG3H1061, CMRPG3G1002)
Text and Data Mining valid from 2019-08-24
Received: 27 February 2019
Revised: 10 August 2019
Accepted: 13 August 2019
First Online: 24 August 2019
Compliance with Ethical Standards
: This study was exempt from approval requirements by the Institutional Review Board of Chang Gung Memorial Hospital in Taiwan (IRB number, 201601518B0) and without permission of patient’s consent, given that it was an epidemiology study with no definable patient information.
: The authors declare that they have no conflict of interests.