An introduction to Dr John Martin
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What is the procedure for a colonoscopy?
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Why is detecting colon cancer early important?
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What early signs of colon cancer should people be aware of?
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Expert insight: Diagnosing Crohn's disease - Online interview
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Ulcerative colitis: an expert on the causes, management and treatment. - Online interview
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Colon cancer: what to watch out for and what can be done
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