1. Hospital Israelita Albert Einstein, São Paulo, Brazil
2. School of Dentistry, University of São Paulo, São Paulo, Brazil
3. Nephorology Division, Federal University of Sao Paulo, São Paulo, Brazil
4. Latin American Oral Health Association, São Paulo, Brazil
5. Postgraduate Program in Dentistry, Universidade Cruzeiro do Sul, São Paulo, Brazil
6. Department of Periodontology, School of Dentistry, The University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA