1. John Paul II Geriatric Hospital, 40-353 Katowice, Poland
2. Institute of Psychology, Humanitas Academy, 41-200 Sosnowiec, Poland
3. Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Stockholm, Sweden
4. Theme Inflammation and Aging, Karolinska University Hospital, 141 86 Huddinge, Sweden