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oa South African Medical Journal - Smoking and chronic respiratory symptoms in 11-15-year-old children

 

Abstract

A questionnaire was used to assess the prevalence of smoking and chronic respiratory symptoms in 315 White and 290 Coloured children in the 11 - 15-year-old age group.

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/content/m_samj/56/8/AJA20785135_15473
1979-08-01
2016-12-04
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