1. University at Albany; State University of New York; 1400 Washington Ave. Albany NY 12222 US
2. Current affiliation: Department of Biochemistry and Molecular Biology; Miller School of Medicine; University of Miami; 1011 NW 15th Street Miami FL 33136 US
3. Current affiliation: Scientific Computing Group; National Center for Computational Sciences; Oak Ridge National Laboratory; 1 Bethel Valley Rd. Oak Ridge TN 37831 US