The baseline characteristics of all eligible studies.
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Abbreviations: HB = hospital-based design; PB = population-based design; NA = not available; CD = Crohn's disase; UC = ulcerative colitis.
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2015-12-02
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Abbreviations: HB = hospital-based design; PB = population-based design; NA = not available; CD = Crohn's disase; UC = ulcerative colitis.