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Chalmers N, Redhead DN, Simpson KJ, Hayes PC.Chalmers N, et al. Among authors: hayes pc.Clin Radiol. 1992 Sep;46(3):166-9. doi: 10.1016/s0009-9260(05)80438-6.Clin Radiol. 1992.PMID: 1395420
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Simpson KJ, Jones AL, Forbes Howie A, Hayes PC.Simpson KJ, et al. Among authors: hayes pc.Eur J Gastroenterol Hepatol. 1995 May;7(5):455-60.Eur J Gastroenterol Hepatol. 1995.PMID: 7542148