1. ARDEC; Ariminum Odontologica; Rimini; Italy
2. Faculdade de Odontologia de Araçatuba; UNESP-Univ Estadual Paulista; Araçatuba; Brasil
3. Faculty of Dentistry; University of Medical Science; La Habana; Cuba
4. The University of Hong Kong; Prince Philip Dental Hospital; Hong Kong; China