Calcium homeostatic relationships governed by the parathyroid and kidney behave normally in the GNAQ/GNA11 mosaic cohort. (a) Significant inverse correlation between serum calcium corrected to albumin and serum PTH. (b) Significant correlation between serum calcium corrected to albumin and urine calcium/creatinine ratio. (c) Significant correlation between 1,25-hydroxyvitamin D and intact FGF23. (d) Correlation between 1,25-hydroxyvitamin D and PTH. Statistical correlations were performed in Prism as detailed in the methods. FGF23, fibroblast growth factor 23; 1,25OH, 1,25-hydroxy; PTH, parathyroid hormone.