1. The Irish Longitudinal Study on Ageing and School of Medicine, Trinity College Dublin, Ireland
2. Department of Neurology, University of California, Irvine, USA
3. Department of Kinesiology, University of North Carolina at Greensboro, North Carolina, USA
4. Mercer’s Institute for Successful Ageing, St. James’s Hospital, Dublin, Ireland
5. Department of Physical Education and Sport Sciences and Health Research Institute, University of Limerick, Ireland