1. Division of Psychotherapy and Psychosomatic Medicine, Department of Psychiatry, Wroclaw Medical University, 50-367 Wrocław, Poland
2. Lower Silesian Oncology, Pulmonology and Hematology Center, 53-413 Wroclaw, Poland
3. Department of Health and Clinical Psychology, University of Adam Mickiewicz, 60-568 Poznan, Poland
4. Department and Clinic of Internal Medicine and Diabetology, Medical University of Karol Marcinkowski, 61-701 Poznan, Poland
5. University Teaching Hospital, 65-046 Zielona Góra, Poland