1. Research Assistant, Section of Anatomy, Department of Growth, Development and Structure, Southern Illinois University School of Dental Medicine, Edwardsville, Illinois,
2. Assistant Professor, Section of Pediatric Dentistry, Department of Growth, Development and Structure, Southern Illinois University School of Dental Medicine, Edwardsville, Illinois, and
3. Associate Professor and Section Head of Anatomy, Department of Growth, Development and Structure, Southern Illinois University School of Dental Medicine, Edwardsville, Illinois