1. Department of Chemistry, Purdue University, Brown Building, 560 Oval Drive, West Lafayette, Indiana 47907, United States
2. Millennium, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
3. CNA, 4825 Mark Center Drive, Alexandria, Virginia 22311, United States
4. British Petroleum, 150 West Warrenville Road, Naperville, Illinois 60563, United States