1 Division of Geriatric Medicine, Department of Medicine, National University Hospital, Singapore, Singapore. reshmaa@nuhs.edu.sg.
2 Department of Medicine, Yong Loo Lin School of Medicine, 1E Kent Ridge Rd., NUHS Tower Block Level 10, Singapore, 19228, Singapore. reshmaa@nuhs.edu.sg.
3 Department of Geriatrics, Faculty of Health Sciences, Medical University of Bialystok, Kilinski Str. 1, 15-089, Bialystok, Poland.
4 Department of Geriatric Medicine, Odense University Hospital, J.B. Winsloews Vej 4, 5000, Odense C, Denmark.