Andrew Sadler was formerly a Consultant Oral & Maxillofacial Surgeon, latterly a Clinical Lecturer in Oral Surgery, former examiner for the Fellowship and Membership of the Faculty of Dental surgery of the Royal College of surgeons Ishita Basu is a Consultant Oral & Maxillofacial Surgeon at the Royal London and Homerton hospitals, honorary lecturer & examiner for Membership the Royal College of Surgeons Faculty of Dental Surgery Leo Cheng is a Consultant Oral and Maxillofacial Surgeon at the Royal London and Homerton Hospitals, Honorary Senior Lecturer, Queen Mary University London, and a volunteer surgeon for Mercy Ships