a
Faculty of Science and Engineering, School of Health Care Science, Division of Health Science Manchester Metropolitan University, Chester St., Manchester M1 5GD, UK
b
Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK
E-mail: c.banks@mmu.ac.uk
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Fax: +44 (0)1612476831
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Tel: +44 (0)1612471196