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2. St Bart's Hosp;Gee, S.;Rep,1888
3. Saka, L., and Shiner, M. (1957). Lancet, 2, 876.
4. Shiner, M. (1956). Ibid., 1, 17, 85.
5. Proceedings of the World Congress of Gastroenterology;Shiner, M.; Doniach, I.,1959