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Registrations of leukaemias and lymphomas for 1986 available during October 1987 from three Regional Cancer registries have been cross-checked against a specialist registry of haematopoietic malignancies. The process has increased the specialist registries numbers by 7 per cent. At that time the cancer registries had not registered 50 per cent of identified cases.
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Alexander et al. (1989) studied this question.
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