1. Institute for Research in Biomedicine, Barcelona Science Park, 08028 Barcelona, Spain
2. Lonza AG, CH-3930 Visp, Switzerland
3. CIBER-BBN, Networking Centre on Bioengineering, Biomaterials & Nanomedicine, Barcelona Science Park, Baldiri Reixac 10, Barcelona, Spain
4. Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain