1. University of California, Los Angeles, School of Dentistry, Section of Periodontics, Los Angeles, Calif.
2. Universidade Federal do Espirito Santo, School of Dentistry, Brazil.
3. Universidade Estadual de Ponta Grossa, School of Dentistry, Brazil.
4. University of California, Los Angeles, School of Dentistry, Section of Oral Radiology, Los Angeles, Calif.
5. University of California, Los Angeles, School of Dentistry, Section of Oral Pathology, Los Angeles, Calif.