Early Azathioprine Therapy Is No More Effective Than Placebo for Newly Diagnosed Crohn's Disease

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The second European evidence-based Consensus on the diagnosis and management of Crohn's disease: Definitions and diagnosis

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National Cooperative Crohn's Disease Study: Results of drug treatment

Robert W. Summers, Donald M. Switz, John T. Sessions et al. · Gastroenterology · 1979 · 1.3K citations

National Cooperative Crohn, Clinical Epidemiology, Gastroenterology +2