1. Department of Functional Masticatory Disorders, Medical University of Lublin, Poland
2. Department of Dental Prosthetics, Medical University of Lublin, Poland
3. General Psychology Department, Institute of Psychology, Maria Curie-Sklodowska University, Lublin, Poland
4. Chair and Department of Paedodontics, Medical University of Lublin, Karmelicka 7, 20-081 Lublin, Poland