Funding for this research was provided by:
136 project award (Not available)
Received: 3 March 2020
Accepted: 30 October 2020
First Online: 12 November 2020
Ethics approval and consent to participate
: The research has been approved by Ethics Committee of Shanxi Bethune Hospital (No: YXLL-2019-130). Individual consent to participate was waived due to the nature of administrative registry data and participant privacy is protected through the use of non-identifiable data and by only reporting aggregated data.
: Not applicable.
: The authors declare that they have no competing interests.