RT Journal Article SR Electronic T1 Exercise and the heart: unmasking Mr Hyde JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 999 OP 1000 DO 10.1136/heartjnl-2014-305780 VO 100 IS 13 A1 Guasch, Eduard A1 Mont, LluĂ­s YR 2014 UL http://heart.bmj.com/content/100/13/999.abstract AB