Longevity of men capable of prolonged vigorous physical exercise: a 32 year follow up of 2259 participants in the Dutch eleven cities ice skating tour.British Medical Journal 1990; 301 doi: https://doi.org/10.1136/bmj.301.6766.1409 (Published 22 December 1990) Cite this as: British Medical Journal 1990;301:1409
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