1. Department of Palliative Care, Christchurch Hospital, Christchurch, New Zealand.
2. Department of Clinical Pharmacology, Christchurch Hospital, Christchurch, New Zealand.
3. Department of Older Persons' Health, Burwood Hospital, Christchurch, New Zealand.
4. Department of Medicine, University of Otago, Otago, New Zealand.
5. Department of General Medicine, Christchurch Hospital, Christchurch, New Zealand.