1. Department of Chemistry; University of Pennsylvania; 231 S 34 St, Philadelphia PA 19104
2. Harvard Medical School; 300 Longwood Ave Boston MA 02115
3. Science for Life Laboratory Department of Theoretical Physics; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
4. Institute for Computational Molecular Science College of Science and Technology; Temple University; 1925 N 12 St, Philadelphia PA 19122