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3. Department of Health. Report on Confidential Enquiries into Maternal Deaths in England and Wales 1982–1984. London, HMSO, 1989
4. Department of Health and others. Report on Confidential Enquiries into Maternal Deaths in the United Kingdom 1985–1987. London, HMSO, 1991
5. Department of Health and others. Report on Confidential Enquiries into Maternal Deaths in the United Kingdom 1991–1993. London, HMSO, 1996