HIF1A and cyclic hematopoiesis: The mean relative expressions for HIF1-α were 0.89 ± 0.21 for CH (n = 16), 0.55 ± 0.25 for H (n = 16, p < 0.01 vs. CH), 0.78 ± 0.58 for CHR (n = 14), and 0.43 ± 0.26 for HR (n = 14, p < 0.0001 vs. CH).