1. School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT,
United Kingdom
2. The School
of Materials, University of Manchester,
Oxford Road, Manchester,
M13 9PL, United Kingdom
3. Huntsman Polyurethanes, Everslaan 45, 3078 Everberg,
Belgium
4. Astbury Centre
for Structural
Molecular Biology, University of Leeds,
Woodhouse Lane, Leeds LS2 9JT, United Kingdom