NPPB and heart failure: Individual data from 12 763 patients with HFrEF in the BIOS (Biomarkers In Heart Failure Outpatient Study) consortium show that NT‐proBNP independently predicts 5‐year all‐cause mortality, even with a paradoxical reduction in absolute NT‐proBNP levels with increasing BMI categories (3785, 2193, 1554, 1045, 755, and 879 ng/L, for underweight, normal weight, overweight, and mildly, moderately, and severely obese patients, respectively).30