1. Department of Family Medicine, Chair of Internal Medicine and Gerontology, Jagiellonian University Medical College, Krakow, Poland;
2. Institute of Public Health, Chair of Health Sciences, Jagiellonian University Medical College, Krakow, Poland;
3. Unit for Research on Aging Society, Department of Sociology of Medicine at Chair of Epidemiology and Preventive Medicine, Jagiellonian University Medical College, Krakow, Poland