Funding for this research was provided by:
Natural Science Foundation of Liaoning Province of China (20180550272)
Medical Education Program of China Medical University ([2016]4-3)
Article History
Received: 30 January 2021
Accepted: 3 April 2021
First Online: 5 July 2021
Declarations
:
: The authors declare no potential conflict of interest.
: This was a retrospective bibliometric study that did not involve human subjects. Therefore, the need for institutional ethics review board approval was waived.
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