1. School of Nursing (J.J.L., W.N.T., J.Y.Y.K.), The University of Hong Kong, Hong Kong SAR.
2. School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, United Kingdom (S.C.Y.).
3. Now with Central Coast Local Health District, New South Wales Health, Australia (S.C.Y).
4. Sau Po Centre on Ageing, Department of Social Work and Social Administration (V.W.Q.L.), The University of Hong Kong, Hong Kong SAR.
5. Division of Neurology, Department of Medicine, Queen Mary Hospital, LKS Faculty of Medicine (K.K.L.), The University of Hong Kong, Hong Kong SAR.