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22. Colonic electrical activity recording and total fiberoptic colonoscopy. Two new applications of transintestinal intubation. Provenzale L, Revignas A. Am J Gastroenterol; 1971 Aug; 56(2):137-48. PubMed ID: 5098213 [No Abstract] [Full Text] [Related]
23. Flexible fiberoptic colonoscopy. A guide for its use in the management of diseases of the colon. Marks G. JAMA; 1974 Jun 10; 228(11):1411-3. PubMed ID: 4406620 [No Abstract] [Full Text] [Related]
24. Colonoscopy: Its principles and applications. Appel MF. South Med J; 1975 Jun 10; 68(6):717-8. PubMed ID: 1135647 [Abstract] [Full Text] [Related]