1. Department of Chemistry, University of Warwick, Coventry, CV4 7AL, U.K.
2. Department of Physics, University of Warwick, Coventry, CV4 7AL, U.K.
3. Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, SK10 4TF, U.K.
4. New Modalities and Parenteral Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, SK10 4TF, U.K.