1. Sudden death and sport;Opie;Lancet,1975
2. Incidence of death during jogging in Rhode Island from 1975 through 1980;Thompson;JAMA,1982
3. ECG aberrations, latent coronary heart disease and cardiopulmonary fitness in various age groups of Norwegian cross-country skiers;Lie;Acta Med Scand,1978
4. The Minnesota code for ECG classification. Adaptation to CR leads and modification of the code for ECGs recorded during and after exercise;Åstrand;Acta Med Scand,1967