Funding for this research was provided by:
National Institute for Health Research (CS-2015-15-008)
Received: 15 May 2019
Accepted: 26 May 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: Fresenius Medical Care (Europe) collected and processed data in accordance with all applicable local ethical and regulatory obligations concerning patient data for each of the 15 participating countries and licensed the anonymous data to Amgen. These approvals encompass subsequent analyses including this one. Informed patient consent was obtained from all patients by Fresenius Medical Care (Europe). In addition, research governance of this analysis was reviewed by the Sheffield Teaching Hospitals NHS Trust Research and Innovation Office (reference STH18934).
: Not applicable.
: The authors declare that they have no competing interests.