STK32B and essential thrombocythemia: After age stratification, in late onset ET (age at onset ≥ 40 years) patients and controls, the differences of genotypes attributions and alleles frequencies were still significant in rs10937625 of STK32B (genotype p = 0.002, OR = 0.41[0.24–0.71]; allele p = 0.001, OR = 0.64[0.49–0.83]).