1 Department of Plastic and Reconstructive Surgery, University Hospitals of Coventry and Warwickshire, Clifford Bridge Road, Coventry, CV2 2DX, UK. Electronic address: joseph.hardwicke@uhcw.nhs.uk.
2 Department of Plastic and Reconstructive Surgery, University Hospitals of Coventry and Warwickshire, Clifford Bridge Road, Coventry, CV2 2DX, UK.