1 | Department for Health Problems of Ageing, Institute of Rural Health, Lublin, Poland |
2 | College of Public Health, Zielona Góra, Poland |
3 | Department of Zoonoses, Institute of Rural Health, Lublin, Poland |
4 | Department of Physiopathology, Institute of Rural Health, Lublin, Poland |
5 | Faculty of Health, Catholic University, Ruzomberok, Slovakia |
6 | Institute of Statistics and Demography, School of Economics, Warsaw, Poland |