NPPB and heart failure: Furthermore, N‐terminal pro-brain natriuretic peptide (NT-proBNP) levels were higher in Belgian patients (1714 [IQR 636–2803] vs 448 [IQR 228–1081], p = 0.018), in line with the higher amount of patients with heart failure (21.4% vs. 15.0%, p = 0.013, Tab. 1), even though the number of NT-proBNP measurements were low in Belgium and disproportionate between the two countries, 10 (3%) versus 119 (18%) patients.