1. Immunology and Allergy Laboratory , San Giovanni di Dio Hospital , Florence , Italy
2. Laboratory of Clinical Pathology , Azienda Sanitaria Universitaria Integrata , Udine , Italy
3. Pontifícia Universidade Católica de Goiás , Goîania , Brazil
4. Department of Oral Biology , University of Florida , Gainesville , FL , USA
5. Rheumatology Division, Escola Paulista de Medicina , Universidade Federal de Sao Paulo , Sao Paulo , Brazil
6. Immunology Division , Fleury Medicine and Health Laboratories , Sao Paulo , Brazil