NPPB and atrial fibrillation: Age, obesity, New York Heart Association status, HF cause, HF hospitalization, comorbidities/risk factors (HP, stable angina, MI, PCI/CABG, AF, diabetes, stroke/TIA, COPD/asthma, valve disease, smoking), EF capped at 60%, heart rate, SBP, hemoglobin, ln-NT-pro-BNP, natural log-neutrophil count, glomerular filtration rate capped at 90 mL/min per 1.73 m2, and all medications