SLC34A3 and Hypercalciuria: In mice, disruption of Npt2c (Npt2 designate a mouse NaPi‐2) causes hypercalciuria and increased serum 1,25(OH)2D3 concentrations, but not hypophosphatemia, rickets, or nephrocalcinosis (Segawa, Onitsuka, Kuwahata, et al., 2009).