1. School of Natural and Environmental Sciences, Newcastle University, Newcastle upon TyneNE1 7RU, United Kingdom
2. Boothroyd Scientific Consulting Ltd., 71-75 Shelton Street, LondonWC2H 9JQ, Greater London, United Kingdom
3. The Open Force Field Initiative, Open Molecular Software Foundation, Davis, California95616, United States
4. Department of Chemistry, University of California, Irvine, California92697, United States
5. Department of Pharmaceutical Sciences, University of California, Irvine, California92697, United States
6. Cresset, New Cambridge House, Bassingbourn Road, LitlingtonSG8 0SS, Cambridgeshire, United Kingdom
7. Computational & Systems Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York10065, United States
8. Department of Chemistry, Lancaster University, LancasterLA1 4YW, United Kingdom