1. 1Chair and Department of Hygiene and Epidemiology, The Ludwik Rydygier Collegium Medicum in Bydgoszcz, The Nicolaus Copernicus University in Toruń, M. Sklodowskiej-Curie 9, 85-094, Bydgoszcz, Poland
2. 2Department of Biochemistry, The Ludwik Rydygier Collegium Medicum in Bydgoszcz, The Nicolaus Copernicus University in Torun, Karłowicza 24, 85-092, Bydgoszcz, Poland
3. 3Institute for Ageing and Health, The Medical School, Newcastle University, Framlington Place, Newcastle-upon-Tyne, NE2 4HH, Great Britain