1 School of Medical Education, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.
2 Department of Plastic and Reconstructive Surgery, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, UK.
3 Department of Plastic and Reconstructive Surgery, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, UK. Electronic address: sahan.rannan-eliya@nuth.nhs.uk.