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2. Royal College of Physicians (1989) Prenatal Diagnosis and Genetic Screening: community and service implications. London, RCP.
3. Anionwu, E.N. (1989) ‘Running a sickle cell centre: community counselling’, Chapter 14, pp. 123–30 in Anionwu, E.N., Ethnic Factors in Health & Disease, London, Wright.
4. Stevenson, A.C. and Davison, B.C.C. (1976) Genetic Counselling, p. 274, London, Heinemann.
5. Black, J. and Laws, S. (1986) p. 365, p. 180, Living with Sickle Cell Disease, London, Sickle Cell Society.