Urinary tetrahydroaldosterone is associated with circulating FGF23 in kidney stone formers.

"Declarations Conflict of interestDGF has served as a consultant for Otsuka Pharmaceuticals and Alnylam, and has received unrestricted research funding from Novartis, Abbvie, Otsuka Pharmaceuticals and Boehringer Ingelheim. Conflict of interest DGF has served as a consultant for Otsuka Pharmaceuticals and Alnylam, and has received unrestricted research funding from Novartis, Abbvie, Otsuka Pharmaceuticals and Boehringer Ingelheim."

"Funding Open access funding provided by University of Bern. DGF was supported by the Swiss National Centre of Competence in Research NCCR TransCure, the Swiss National Centre of Competence in Research NCCR Kidney.CH and the Swiss National Science Foundation (grants # 31003A_135503, 31003A_152829 and 33IC30_166785/1). MBM was supported by the Swiss National Centre of Competence in Research NCCR Kidney.CH."