1. Department of Orthodontics, Faculty of Dentistry, University Central of Venezuela, Caracas, Venezuela
2. Facultad de Odontología, Universidad Central de Venezuela, Orthodontic Private Practice, Caracas, Venezuela
3. Department of Oral and Maxillofacial Sciences, “Sapienza” University of Rome, Rome, Italy
4. Director of Orthognatodontic Unit, Umberto I Hospital, Roma, Italy