1. Information and Communications Technologies, Imperial College London, South Kensington, London, SW7 2AZ, United Kingdom, Department de Fisica Fundamental, Universitat de Barcelona, Carrer Marti i Franques 1, 08028 Barcelona, Spain, and Computational Biochemistry and Biophysics Lab (GRIB-IMIM), Universitat Pompeu Fabra, Barcelona Biomedical Research Park (PRBB), C/ Doctor Aiguader 88, 08003 Barcelona, Spain