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	1.	Prevalence and long-term significance of exercise-induced frequent or repetitive ventricular ectopic beats in apparently healthy volunteers. [electronic resource] by Busby, M J Shefrin, E A Fleg, J L Producer: 19900110 In: Journal of the American College of Cardiology vol. 14 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Prevalence and prognostic significance of exercise-induced supraventricular tachycardia in apparently healthy volunteers. [electronic resource] by Maurer, M S Shefrin, E A Fleg, J L Producer: 19950518 In: The American journal of cardiology vol. 75 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Can serial exercise testing improve the prediction of coronary events in asymptomatic individuals? [electronic resource] by Josephson, R A Shefrin, E Lakatta, E G Brant, L J Fleg, J L Producer: 19900223 In: Circulation vol. 81 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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