1. Department of Family Medicine, Wrocław Medical University, Wrocław, Poland;
2. Centre for Ageing Research, Division of Health Research, Lancaster University, Lancaster, UK;
3. Opole Medical School, Opole, Poland;
4. Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy;
5. School of Life & Health Sciences, Aston University, Aston, UK