^aHonorary Senior Fellow, School of Dental Science, University of Melbourne, and private practice of orthodontics, Hawthorn East, Victoria, Australia

^bAssociate Professor and Head, Oral and Maxillofacial Surgery, Royal Children’s Hospital of Melbourne, and Private Practice of Oral and Facial Surgery, Melbourne, Victoria, Australia

^cJarabak Professor and Head, Section of Orthodontics, Indiana University, School of Dentistry, 1121 W. Michigan Street, Indianapolis, IN.