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Authors
Zheng, Guoqiao http://orcid.org/0000-0003-4337-9017
Sundquist, Jan
Sundquist, Kristina
Ji, Jianguang
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Funding
Funding for this research was provided by:
Lund University
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Article History
Received: 21 May 2021
Accepted: 14 October 2021
First Online: 12 November 2021
Declarations
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: We secured ethical approval and waiver of informed consent (February 6, 2013) for this study from the Regional Ethical Review Board of Lund University (Dnr 2012/795). Patient consent was not required as the study used only de-identified registry based secondary data. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare no competing interests.
