1. Department of Chemistry, West Virginia University, 217 Clark Hall, Prospect Street, Morgantown, West Virginia 26506, United States
2. Center for BioMedical Computing, University of Verona, Istituti Biologici, Blocco A, Strada le Grazie 8, 37134, Verona, Italy
3. The Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, Maryland 20723, United States