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    Footnotes

    • Funding: WS has received research support from and has served as a consultant for Abbott Laboratories, Centocor, Schering Plough and UCB Pharma, and has participated in continuing medical education events indirectly sponsored by Abbott Laboratories, Centocor, Schering Plough and UCB Pharma.

    • Competing interests: Declared (the declaration can be viewed on the Gut website at http://gut.bmj.com/content/vol57/issue4).

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