1 Reconstructive Surgery & Regenerative Medicine Research Group, Institute of Life Sciences 2, Swansea University Medical School, Swansea, SA2 8PP UK; The Welsh Centre for Burns & Plastic Surgery, Morriston Hospital, Hoel Maes Eglwys, Swansea, SA6 6NL, UK. Electronic address: j.a.g.gibson@swansea.ac.uk.
2 Reconstructive Surgery & Regenerative Medicine Research Group, Institute of Life Sciences 2, Swansea University Medical School, Swansea, SA2 8PP UK; The Welsh Centre for Burns & Plastic Surgery, Morriston Hospital, Hoel Maes Eglwys, Swansea, SA6 6NL, UK.