Hematologic parameters of peripheral blood from Phd1^−/−, Phd3^−/−, and Phd1/3 DKO mice. (A-E) Phd1/3 DKO and wild-type control mice. RBC indicates red blood cells; Hb, hemoglobin; Hct, hemtocrit; and WBC, white blood cells. n = 6. (E) ELISA for serum Epo levels. n = 4. **P < .01; *P < .05. (F-J) Normal blood properties in Phd1^−/− or Phd3^−/− mice. (A-I) Hematologic parameters of peripheral blood indicated in figures from wild-type (WT), Phd1^−/−, or Phd3^−/− mice. P > .05 for all pairs of comparisons. n = 6. (J) ELISA for serum Epo levels in WT, Phd1^−/−, or Phd3^−/− mice. n = 6. Error bars represent SEM.