Conflict of interest
JV received consulting fees from Vifor Pharma (to employer). MHdB has consultancy agreements with Amgen, Astellas, Astra Zeneca, Bayer, Kyowa Kirin, Vifor Pharma, and Sanofi Genzyme, and received grant support from Sanofi Genzyme and Vifor Pharma (all to employer). ME received consultant fees and speakers bureaus from Vifor Pharma and serves on the Advisory Board for Cablon Medical. The results presented in this paper have not been published previously in whole or part, except in abstract format.The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.