Fletcher G F, Balady G, Blair S N, Blumenthal J, Caspersen C, Chaitman B, Epstein S, Sivarajan Froelicher E S, Froelicher V F, Pina I L, Pollock M L
Office of Scientific Affairs, American Heart Association, Dallas, TX 75231-4596, USA.
Circulation. 1996 Aug 15;94(4):857-62. doi: 10.1161/01.cir.94.4.857.