1. Small Biosystems Lab, Departament de Física Fonamental, Universitat de Barcelona, Avinguda Diagonal 647, 08028 Barcelona, Spain
2. CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Madrid, Spain
3. Centro Nacional de Biotecnología, CSIC, 28049 Cantoblanco, Madrid, Spain
4. Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas (IQAC−CSIC), 08034 Barcelona, Spain
5. Institute for Research in Biomedicine (IRB Barcelona), Barcelona Science Park, Baldiri Reixac 10-12, 08028 Barcelona, Spain
6. Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
7. School of Chemistry and Physics, University of KwaZulu-Natal, 4001-Durban, South Africa.