CRB2 and Microscopic hematuria: Microhematuria was also more recognizable in Crb2fl/flpod-CreTg/+ mice than in Crb2+/+pod-CreTg/+ or Crb2fl/fl mice (1.42 ± 0.66 vs. 0 ± 0 or 0.08 ± 0.2, P < 0.0001 or P = 0.002) (Fig. 3a).