Campbell, Ross T., Jackson, Colette E., Wright, Ann, Gardner, Roy S., Ford, Ian, Davidson, Patricia M., Denvir, Martin A., Hogg, Karen J., Johnson, Miriam J., Petrie, Mark C., McMurray, John J.V., "Palliative care needs in patients hospitalized with heart failure (PCHF) study: rationale and design", ESC heart failure, 2015