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Susceptibility of patients with chronic obstructive pulmonary disease to heart rate difference associated with the short-term exposure to metals in ambient fine particles: A panel study in Beijing, China

Heart Rate DifferenceEnvironmental Lung DiseasesEnvironmental ExposurePanel StudyEnvironmental HealthEnvironmental EpidemiologyAir QualityHuman ExposureMetal ToxicityAmbient Fine ParticlesEnvironmental ToxicologyPublic HealthAir PollutionEpidemiology