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