1. Department of Chemistry; University of Cambridge; Lensfield Road CB2 1EW Cambridge UK
2. GSK Vaccines; Via Fiorentina 1 53100 Siena Italy
3. Departamento de Química, Centro de Investigación en Síntesis Química; Universidad de La Rioja; 26006 Logroño Spain
4. Cambridge Centre for Proteomics, Cambridge Systems Biology Centre; Department of Biochemistry; University of Cambridge; Tennis Court Road Cambridge CB2 1QR UK
5. Instituto de Medicina Molecular, Faculdade de Medicina; Universidade de Lisboa; Avenida Professor Egas Moniz 1649-028 Lisboa Portugal