1. Department of Chemistry, St. Olaf College, 1520 St. Olaf Avenue, Northfield, Minnesota 55057, United States
2. NextMove Software Ltd, Unit 23, Cambridge Science Park, Cambridge, CB4 0EY, United Kingdom
3. Varian Medical Systems Finland Oy, Paciuksenkatu 21, Helsinki 00270, Finland
4. Moscow Department, Advanced Chemistry Development, 6 Akademika Bakuleva Street, Moscow 117513, Russia