1. National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, USA
2. National Institute of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
3. State University of Campinas, Piracicaba Dental School, Department of Prosthodontics and Periodontics, Piracicaba, Brazil
4. Division of Veterinary Resources, Office of Research Services, National Institutes of Health (NIH), Bethesda, MD, USA