1. Theoretical Separation Science Laboratory, Rohm and Haas Company, 727 Norristown Road, Box 0904, Spring House, Pennsylvania 19477-0904
2. Army High Performance Computing Research Center, University of Minnesota, 1100 Washington Avenue South, Minneapolis, Minnesota 55415
3. Department of Medicinal Chemistry and Minnesota Supercomputer Institute, University of Minnesota, 599 Walter Library, 117 Pleasant Street S.E., Minneapolis, Minnesota 55455
4. Department of Chemical Engineering and Materials Science, University of Minnesota, Amundson Hall, 421 Washington Avenue S.E., Minneapolis, Minnesota 55455