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The Watson peroral small intestinal biopsy capsule was a system used through from the 1960s to obtain small intestinal wall biopsies in patients with suspected coeliac disease and other diseases affecting the proximal small bowel.
A similar device known as the Crosby-Kugler capsule was also developed in the 1950s and utilized for similar purposes.
- Dady, Ian M; Thomas, Adrian G.; Miller, Victor; Kelsey, Anna J. (1996). "Inflammatory Bowel Disease in Infancy: An Increasing Problem?". Journal of Pediatric Gastroenterology & Nutrition (Lippincott-Raven) 23 (5): 568–576. Retrieved 12 Nov 2010.