The correlation between FABP4 and NT-proBNP was higher (p=0.05) in the HF diabetic subjects (r=0.689, p<0.001; Additional file1: Figure S1B) compared to the non-diabetic HF subjects (r=0.470, p<0.001), and the difference was even more significant (p<0.001) in the non-obese HF subjects (r=0.883, p<0.001; Additional file1: Figure S1C) compared to the obese HF subjects (r=0.605, p<0.001). The gene discussed is NPPB; the disease is hydrops fetalis.