Funding for this research was provided by:
Kaohsiung Medical University (KMUH106-6R74)
Text and Data Mining valid from 2019-12-01
Received: 23 January 2019
Accepted: 22 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: Ethics permission was approved by the Institutional Review Board of Chi Mei Medical Center (IRB No. 10708-E01), and the requirement for informed consent was waived. The data for this study was obtained from the National Health Insurance Research Database (NHIRD, ExternalRef removed). The application of permission to access the data was sent to National Health Research Institute (NHRI), Taiwan and approved. The NHIRD has been transferred to the Health and Welfare Data Science Center (HWDC), Department of Statistics, Ministry of Health and Welfare, Taiwan (ExternalRef removed).
: Not applicable.
: The authors declare that they have no competing interests.