1. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, Mile End, London, UK.
2. Cork University Dental School and Hospital, Wilton, Cork, Ireland.
3. Department of Civil and Mechanical Engineering, University of Glasgow, Glasgow, UK.
4. Barts & The London School of Dentistry, Centre for Adult Oral Health, Stepney Way, Whitechapel, London, UK.