University of Glasgow - Institute of Health and Wellbeing, University of Glasgow - Institute of Health and Wellbeing, University of Glasgow - Institute of Health and Wellbeing, University of Glasgow - Institute of Health and Wellbeing, University of Glasgow - Institute of Cardiovascular and Medical Sciences, National Institute for Health and Clinical Excellence (NHS), University of Bristol - Department of Population Health Sciences, University of York, University of Bristol, University of Leeds - School of Medicine, Newcastle University - AGE Research Group, School of Health Administration - Division of Geriatric Medicine, University of Glasgow - Institute of Health and Wellbeing and University of Glasgow - Institute of Health and Wellbeing