1. Instructor, Department of Audiology and Speech Pathology, Hacettepe University Faculty of Medicine, Ankara, Turkey
2. Research Resident, Department of Orthodontics, Başkent University Istanbul Hospital, Istanbul, Turkey
3. Professor, Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
4. Professor, Department of Audiology and Speech Pathology, Hacettepe University Faculty of Medicine, Ankara, Turkey; Deceased on October 2, 2010