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Emmanuel JH, Montgomery RD.Emmanuel JH, et al. Among authors: montgomery rd.Postgrad Med J. 1971 Apr;47(546):227-32. doi: 10.1136/pgmj.47.546.227.Postgrad Med J. 1971.PMID: 5576491Free PMC article.
Jolobe OM, Montgomery RD.Jolobe OM, et al. Among authors: montgomery rd.Digestion. 1984;29(3):164-70. doi: 10.1159/000199027.Digestion. 1984.PMID: 6745508