Received: 22 May 2020
Accepted: 30 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: The Peking University First Hospital Clinical Research Ethics Committee approved the study. This study was a retrospective study. All patients in the study were from our prospective IgA nephropathy cohort, in which all patients signed a consent form when they were recruited for the cohort.
: Not applicable.
: The authors declare that they have no competing interests.