1. Institute of Neurofeedback and tDCS Poland, 70-393 Szczecin, Poland
2. Institute of Psychology, University of Szczecin, 71-017 Szczecin, Poland
3. Department and Clinic of Psychiatry, Poznan University of Medical Sciences, 61-701 Poznań, Poland
4. Department and Clinic of Psychiatry, Wrocław Medical University, 54-235 Wrocław, Poland