Simon Gaisford is professor of pharmaceutics at UCL School of Pharmacy, University College London, 29â39 Brunswick Square, London, WC1N 1AX, United Kingdom, and director at Wattsense Ltd, 3 Romney Road, Ashford, Kent, TN24 0RW, United Kingdom; Tel: +44 (0) 20 7753 5863, Fax: +44 (0) 20 7753 5942, s.gaisford@ucl.ac.uk.