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Clinical Centre for Health Professions, University of Brighton, 49, Darley Road, Eastbourne BN20 7UR, UK  Corresponding author. Tel./fax: +44 1273 643766.
PII: S1356-689X(09)00193-3 doi:10.1016/j.math.2009.12.002 © 2009 Elsevier Ltd. All rights reserved. | |
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