1. BDS(Hons), MDSci, FIMLS, FDSRCPS, DOrth, MOrth. Department of Orthodontics and Restorative Densitry, The Glenfield Hospiital, Groby Road, Leicester, LE3 9QP, England, UK

2. Dr. Med. Dr. Med. Dent. Poliklinik fur Kieferorthopadie, Klinik fur Zahn-, Mund- und Kieferheilkunde der Johannes Gutenberg-Universitat, Augustusplatz 2, 55131 Mainz, Germany