RT Journal Article SR Electronic T1 Hyponatremia and outcomes in patients with heart failure JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1761 OP 1762 DO 10.1136/heartjnl-2012-302854 VO 98 IS 24 A1 Steven R Goldsmith YR 2012 UL http://heart.bmj.com/content/98/24/1761.abstract AB