Article Text
Causation
Review: parental smoking increases risk of recurrent otitis media, middle ear effusion, and tonsillectomy or adenoidectomy in children
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Footnotes
Source of funding: UK Department of Health.
For correspondence: Dr D P Strachan, Department of Public Health Sciences, St George's Hospital Medical School, Cranmer Terrace, London SW17 0RE, UK. Fax +44 (0)181 725 3584.