1. Department of Orthodontics, School of Health Sciences, Faculty of Dentistry, Marmara University, Istanbul 34722, Turkey
2. Dental School, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. Certified Systemic Analyst Executive Mastering Program, University of Piraeus, 18534 Piraeus, Greece
4. Department of Stomatology and Maxillofacial Surgery, Faculty of Medicine, Comenius University Bratislava, 81250 Bratislava, Slovakia
5. Research Center, Swiss School of Management, 6500 Bellinzona, Switzerland