1. Department of Palliative Medicine, Institute of Medical Sciences, Collegium Medicum, University of Zielona Góra, ul. Zyty 28, 65-046 Zielona Góra, Poland
2. Department of Psychology, Kazimierz Wielki University, ul. Leopolda Staffa 1, 85-867 Bydgoszcz, Poland
3. University Hospital in Poznań, Osiedla Rusa 55, 61-245 Poznań, Poland
4. MediCenter Primary Care Physicians, ul. 3 Maja 13, 99-400 Łowicz, Poland
5. Department of Care and Treatment Facility, Józef Struś Multispecialist Municipal Hospital, ul. Szwajcarska 3, 61-285 Poznań, Poland