1. Barrer Centre Department of Chemical Engineering Imperial College London Exhibition Road London SW7 2AZ UK
2. Eli Lilly and Company RNA-Therapeutics 450 Kendal St Cambridge MA 02142 USA
3. Eli Lilly and Company Synthetic Molecule Design & Development 1200 W Morris St Indianapolis IN 46221 USA
4. Networking-Centre on Bioengineering, Biomaterials and Nanomedicine Department of Organic Chemistry University of Barcelona Marti i Franques 1–11 08028 Barcelona Spain
5. School of Chemistry and Physics University of KwaZulu-Natal University Road, Westville Campus Durban 4001 South Africa
6. School of Engineering and Materials Science Queen Mary University of London Mile End Rd, Bethnal Green London E1 4NS UK