| Affiliation: | 1. Assistant professor, Department of Orthodontics, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany;2. Clinical scientist, Global Clinical Investigations, Procter & Gamble Company, Mason, Ohio;3. Postgraduate student, Department of Orthodontics, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany;4. Clinical trial manager, Research & Development, Procter & Gamble Company, Kronberg, Germany;5. Senior statistician, Department of Biostatistics, Procter & Gamble Company, Mason, Ohio;6. Professor and head, Department of Orthodontics, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany |
