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  1. A J Hedley, professor in community medicine,
  2. T H Lam, professor,
  3. S M McGhee, associate professor,
  4. G M Leung, assistant professor,
  5. M Pow, research assistant
  1. Department of Community Medicine, University of Hong Kong, Hong Kong Special Administrative Region, China commed@hkucc.hku.hk

    Editor–The report by Enstrom and Kabat confirms that exposure to secondhand smoke causes injury to the respiratory system with the finding of a combined increased mortality risk for men and women for chronic obstructive pulmonary disease (relative risk 1.65, 95% confidence interval 1.0 to 2.73).1 This is consistent with other investigations that show the sensitivity of the respiratory system to secondhand smoke at all ages and in different settings. In …

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