1. Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, Titu Maiorescu University, 031593 Bucharest, Romania
2. Department of Oral and Maxillofacial Surgery, Carol Davila Central Military Emergency Hospital, 010825 Bucharest, Romania
3. Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
4. Department of Oral and Maxillofacial Surgery, Ramon y Cajal University Hospital, 28034 Madrid, Spain
5. Department of Oral and Maxillofacial Surgery, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain