1. Regent's Professor and Director of Orthodontic Research, Department of Orthodontics, Texas A&M University Baylor College of Dentistry, Dallas, TX.
2. Dental student, Texas A&M Baylor College of Dentistry, Dallas, TX.
3. Private Practice, Dallas, TX.
4. Associate Professor and Chairman, Department of Orthodontics, Texas A&M University Baylor College of Dentistry, Dallas, TX.