IL10 and cryohydrocytosis: In the CHC-SF study subgroup, plasma IL-6 level was in a moderate positive association with TSH (ρ = 0.577, p = 0.019), and plasma IL-10 level was in a moderate positive association with hemoglobin and TSH (ρ = 0.577, p = 0.019 and ρ = 0.533, p = 0.034, respectively).