1. Reading
School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6UB, U.K.
2. School
of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AJ, U.K.
3. GlaxoSmithKline, GSK House, 980 Great
West Road, Brentford, Middlesex TW8 9GS, U.K.