1. ARDEC Academy; Ariminum Odontologica; Rimini Italy
2. POI-Programa Odontológico Internacional; Cartagena de Indias Colombia
3. Depto CTBMF e Periodontia FORP-USP- Faculty of Ribeirão Preto; SP Brazil
4. Center for Dental Medicine; University of Zurich; Zurich Switzerland
5. University of Bern; Bern Switzerland