1. Postgraduate Program in Dentistry; Pontifical Catholic University of Rio Grande do Sul; Porto Alegre Brazil
2. Computer Vision Group; Universidad Politécnica de Madrid; Madrid Spain
3. Department of Endodontics; Arthur A. Dugoni School of Dentistry; University of the Pacific; San Francisco CA USA
4. Oral Health Centre; University of Queensland; Herston Qld, Australia
5. Federal University of the Rio Grande do Sul; Porto Alegre Brazil
6. Medical and Dental Center of the Military Police of Rio Grande do Sul; Porto Alegre Brazil
7. Adelaide Dental School; The University of Adelaide; Adelaide SA Australia