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Review: small treatment effect of disodium cromoglycate in childhood asthma is tempered by methodological flaws and publication bias

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  • Source of funding: no external funding.

  • For correspondence: Dr J C van der Wouden, Department of General Practice, FF325, Erasmus University and University Hospital/Sophia Children's Hospital, 3000 DR Rotterdam, the Netherlands. Fax +31 10 408 9491.