Chang, Yu-Kang
Tseng, Yuan-Tsung
Chen, Kow-Tong
Article History
Received: 22 October 2019
Accepted: 27 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: In this study, we used the National Health Institute Research database. According to the regulations of the Ministry of Health and Welfare, Taiwan, all of the NHIR databases are only available from the Information Center, Ministry of Health and Welfare, Taiwan. This study was approved by the Institutional Review Board of National Cheng Kung University Hospital, Tainan, Taiwan. Informed consent from the subjects was not obtained because there was no personal contact with the patients or the data collectors.
: Not applicable.
: The authors declare that they have no competing interests.>