1. Department of General Practice, The University of Melbourne, Carlton, Victoria, Australia.
2. School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong.
3. School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong.
4. Department of Medicine & Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong.
5. Medical & Geriatric Unit, Shatin Hospital, Shatin, Hong Kong.