1. Health Research Institute, Ageing Research Centre, Irish World Academy of Music and Dance, University of Limerick , Limerick V94 T9PX, Ireland
2. Division of Geriatrics, Department of Medicine, University of California , San Francisco, CA 94143, USA
3. Centre for Ageing, Neurosciences and the Humanities, Trinity College Dublin , D02 PN40, Ireland
4. Glucksman Library, University of Limerick , Limerick V94 T9PX, Ireland