DOI:
10.1055/s-00000012
Endoscopy
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References
Everhart JE ed.
Digestive diseases in the United States: epidemiology and impact. US Department of Health and Human Services, Public Health Service, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases.
Everhart JE.
Washington, DC: US Government Printing Office; 1994. NIH publication no. 94-1447
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