- Correspondence to: Dr P N Nelson, Biomedical Research Laboratories, School of Health Sciences, University of Wolverhampton, 62–68 Lichfield Street, Wolverhampton WV1 1DJ, UK; Dr H Bull, Hyman & Clinical Research Group, School of Nursing, University of Nottingham, Derbyshire Royal Infirmary, Derby DE1 2QY, UK
- Accepted September 20, 2001
- First published April 1, 2002.
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