Conclusion
The two procedures under discussion cannot be dissociated. Either they confirm each other, or, when one yields no evidence, the lesion is detected by the other. Through a combination of both procedures the chances of avoiding a wrong negative diagnosis are materially enhanced, and in the presence of a lesion the clinician obtains a well supported affirmative diagnosis.
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Golob, M. The merits of sigmoidoscopy preceding a barium enema study of the colon. Jour. D. D. 10, 182–184 (1943). https://doi.org/10.1007/BF03002297
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DOI: https://doi.org/10.1007/BF03002297