1. Lewisham and Greenwich NHS Foundation Trust, London, United Kingdom of Great Britain and Northern Ireland
2. Department of Oral and Maxillofacial Surgery, G Papanikolaou General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Manchester Royal Infirmary Oxford Road, Manchester, United Kingdom of Great Britain and Northern Ireland
4. Efolikon Speech and Languange Therapy, Thessaloniki, Greece
5. St Luke’s Hospital, Panorama, Greece