No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Aged
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Chicago
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Child
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Child, Preschool
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Colitis, Ulcerative / epidemiology*
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Computers
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Crohn Disease / epidemiology*
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Educational Status
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Epidemiologic Methods
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Family Characteristics
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Female
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Humans
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Infant
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Infant, Newborn
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Male
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Middle Aged
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Occupations
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Proctitis / epidemiology*
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Racial Groups
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Religion
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Sex Factors