Funding for this research was provided by:
Tainan Municipal Hospital (managed by Show Chwan Medical Care Corporation), Tainan, Taiwan (106-2)
Text and Data Mining valid from 2019-04-05
Received: 9 May 2018
Accepted: 31 March 2019
First Online: 5 April 2019
Ethics approval and consent to participate
: In this study, we used the NHIR database. According to the regulation of Ministry of Health and Welfare, Taiwan, all of the NHIR datasets are only available from the information Center, Ministry of Health and Welfare, Taiwan. The study was approved by the Institute Review Board of the Show Chwan Memorial Hospital, Taiwan (No. 1051201). Informed consent from the subjects was not obtained because there was no personal contact between the patients and the data collectors.
: Not applicable.
: The authors declare that they have no competing interests.
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