RT Journal Article SR Electronic T1 Measurement of sodium in heart failure JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1724 OP 1724 DO 10.1136/heartjnl-2017-312799 VO 104 IS 20 A1 Gregorio Paolo Milani A1 Mario Giovanni Bianchetti A1 Sebastiano AG Lava YR 2018 UL http://heart.bmj.com/content/104/20/1724.abstract AB