In HF patients, a close correlation was found between plasma MPO-related chlorinating activity and CP levels (r = 0.363, P < 0.001, and n = 81) whereas no correlation was found between plasma MPO chlorinating activity and FeOxI activity (r = 0.129 and P = 0.190, Figure 3(a)). The gene discussed is CP; the disease is hydrops fetalis.