1. Departamento de Química Física, Facultad de Farmacia, Universidad de Salamanca, 37008 Salamanca, Spain
2. Institut Laue-Langevin (ILL), DS/LSS, 6, rue Jules Horowitz, B.P. 156, 38042 Grenoble Cedex, France
3. Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom