1. Department of Gastroenterology; Torbay Hospital; Torquay UK
2. Department of Oral & Maxillofacial Surgery; Queen Alexandra Hospital; Portsmouth UK
3. Department of Oral Surgery & Pathology; School of Dentistry; Universidade Federal de Minas Gerais-UFMG; Belo-Horizonte Brazil
4. Department of Histopathology; Queen Alexandra Hospital; Portsmouth UK