1. Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
2. Department of Restorative Sciences, Dental College of Georgia, Augusta University, Augusta, GA, USA
3. Private Practice, Beverly Hills, CA, USA
4. Private Practice Limited to Orthodontics, Fayetteville, AR, USA
5. Private Practice, Sao Paulo, Brazil
6. Division of Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA