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Smoking, age, and laryngeal height predicted obstructive airway disease in adults

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  • Sources of funding: UK National Health Service Research and Development Programme and Medical Research Council of Canada.

  • For correspondence: Dr F A McAlister, Division of General Internal Medicine, 2E3.24 Walter Mackenzie Centre, University of Alberta Hospital, 8440 112 Street, Edmonton, Alberta T6G 2R7, Canada. Fax +1 780 407 2680.