1. The Don & Sybil Harrington Professor of Esthetic Dentistry, Division of Restorative Sciences, The Herman Ostrow School of Dentistry; University of Southern California; Los Angeles; CA; USA
2. The Herman Ostrow School of Dentistry; University of Southern California; Los Angeles; CA; USA
3. Department of Dentistry; Federal University of Santa Catarina - UFSC; Florianópolis; SC; Brazil
4. Division of Dental Public Health and Pediatric Dentistry, The Herman Ostrow School of Dentistry; University of Southern California; Los Angeles; CA; USA