1. Department of Medicine, Division of Geriatric Medicine, Walter and Albertina Sisulu Institute of Ageing in Africa, Faculty of Health Sciences, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa
2. Department of Medicine, Division of Geriatric Medicine, Walter and Albertina Sisulu Institute of Ageing in Africa, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
3. Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa