Zheng, Deqiang
Li, Ning
Hou, Rui
Zhang, Xiaoyu
Wu, Lijuan
Sundquist, Jan
Sundquist, Kristina
Ji, Jianguang
Funding for this research was provided by:
Lund University
Article History
Received: 27 November 2022
Accepted: 25 January 2023
First Online: 3 February 2023
Declarations
:
: Our research adhered to the tenets of the Declaration of Helsinki. This nationwide retrospective cohort study was approved by the Ethical Review Board in Lund (number 2012/795 and later amendments). All the individuals involved in this study had pseudonymized serial numbers in the database to protect their integrity. Patient consent was not required for this study. The project database is located at the Center for Primary Health Care Research at Lund University in Malmö, Sweden.
: Not applicable.
: The authors declare that they have no competing interests.