FCGR1A and heart failure: Neutrophil CD11b and CD66b correlated inversely with heart failure severity reflected by NT-proBNP and NYHA class (NT-proBNP: rs = −0.243, p = 0.005 and rs = −0.250, p = 0.004; NYHA class: p = 0.032 and p = 0.055), whereas no association for CD64 could be found.