1. Student Scientific Association at the Department of Psychology, Faculty of Medicine, Medical University of Lublin, 20-093 Lublin, Poland
2. Department of Psychology, Psychosocial Aspects of Medicine, Medical University of Lublin, 20-093 Lublin, Poland
3. Youth Cancer Europe, 400372 Cluj-Napoca, Romania
4. Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, 20-093 Lublin, Poland
5. Department of Pediatric and Adolescent Gynecology, Medical University of Lublin, 20-093 Lublin, Poland