RT Journal Article SR Electronic T1 How to prove without randomised controlled trials that automated external defibrillators used by the public save lives? JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP heartjnl-2018-313071 DO 10.1136/heartjnl-2018-313071 A1 Paul A Calle A1 Nicolas Mpotos YR 2018 UL http://heart.bmj.com/content/early/2018/03/08/heartjnl-2018-313071.abstract AB