a
Institute of Pharmaceutical Science, School of Biomedical Sciences, King's College London, London, UK
b
Department of Chemistry, School of Biomedical Sciences, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, UK
E-mail: gerd.wagner@kcl.ac.uk
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Fax: +44 (0)20 7848 4045
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Tel: +44 (0)20 7848 4747