Received: 28 December 2020
Accepted: 22 March 2021
First Online: 12 June 2021
: We confirmed that all methods were performed in accordance to the Declaration of Helsinki. To protect personal privacy, all information on the care providers or patients was scrambled before being released. This study was approved by the Research Ethics Committee of China Medical University and Hospital (CMUH104-REC2-115), and the need for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.