Emphysema and airway obstruction in non-smoking South African miners with long exposure to silica dust

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      <subfield code="a">Occupational exposure to silica dust is associated with significant impairment of lung function. The present study investigates which pathological changes in the lung are associated with impairment of lung function in silica dust exposed workers who were life-long non-smokers</subfield>
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      <subfield code="g">nº 8, August 1994 ; p. 557-563</subfield>
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