1 Faculty of Medical Sciences, Biosciences Institute, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK.
2 School of Medicine, Physiology, National University of Ireland, Galway, H91 W5P57, Ireland. kasia.whysall@nuigalway.ie.
3 Institute of Ageing and Chronic Disease & The Medical Research Council Versus Arthritis Centre for Integrated Research Into Musculoskeletal Ageing, CIMA, University of Liverpool, Liverpool, L7 8TJ, UK. kasia.whysall@nuigalway.ie.