SLC34A3 and rickets: In humans, NPT2C mutations cause hereditary hypophosphatemic rickets with hypercalciuria (HHRH), a primary renal Pi wasting disorder that results in increased serum 1,25‐dihydroxy vitamin D3 [1,25(OH)2D3] concentrations with associated intestinal Ca2+ hyperabsorption, hypercalciuria, and rickets/osteomalacia (Bergwitz & Miyamoto, 2019; Bergwitz et al., 2006; Lorenz‐Depiereux et al., 2006; Yamamoto et al., 2007).