1 Peripheral Nerve Injury Research Unit, Royal National Orthopaedic Hospital, Stanmore; Department of Pharmacology, UCL School of Pharmacy, University College London, London WC1N 1AX; UCL Centre for Nerve Engineering, University College London, London, UK.
2 UCL Centre for Nerve Engineering; Department of Cell and Developmental Biology, University College London, London, UK.
3 Peripheral Nerve Injury Research Unit, Royal National Orthopaedic Hospital, Stanmore; UCL Centre for Nerve Engineering, University College London, London, UK.
4 Department of Pharmacology, UCL School of Pharmacy, University College London, London WC1N 1AX; UCL Centre for Nerve Engineering, University College London, London, UK.