1. Faculty of Sport and Sciences, Gerontology Research Center, University of Jyväskylä, Jyväskylä, Finland
2. Faculty of Medicine, Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland
3. Department of Otolaryngology, Head & Neck Surgery, Indiana University School of Medicine, Indianapolis, Indiana, United States
4. Department of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland