Ambrosy AP, Gurwitz JH, Tabada GH, Artz A, Schrier S, Rao SV, Barnhart HX, Reynolds K, Smith DH, Peterson PN, Sung SH, Cohen HJ, Go AS. Incident anaemia in older adults with heart failure: rate, aetiology, and association with outcomes. Eur Heart J Qual Care Clin Outcomes. 2019 10 01; 5(4):361-369.