Dept. of Chemistry, University of Southampton, University Road, Highfield, Southampton, SO17 1BJ, UK, Fax: 44 2380 593781, Email: J.W.Emsley@soton.ac.uk
J. Feeney
Molecular Structure Division, MRC National Inst. for Medical Research, The Ridgeway, Mill Hill, London, NW7 1AA, UK, Fax: +44 20 8906 4477, Tel: +44 20 88162023, Email: jfeeney@nimr.mrc.ac.uk