1. Department of Social and Preventive Dentistry; Post-Graduate Program in Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas Brazil
2. Post-Graduate Programs in Epidemiology and Physical Education; Federal University of Pelotas; Pelotas Brazil
3. Department of Operative Dentistry; Post-Graduate Program in Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas Brazil
4. Post-Graduate Programs in Dentistry and Epidemiology; Federal University of Pelotas; Pelotas Brazil