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Abstract
Mesh: See more » Arrhythmia, SinusElectrocardiographyHeart AuscultationHumansPhysical ExertionSports Medicine
Year: 1974 PMID: 4833958 PMCID: PMC1610756 DOI: 10.1136/bmj.2.5919.575
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447