1 Palliative Medical Unit, Grantham Hospital, Hong Kong, China.
2 Division of Nephrology, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong, China.
3 Division of Haematology, Medical Oncology and Haemopoietic Stem Cell Transplantation, Department of Medicine, The University of Hong Kong, Hong Kong, China.
4 Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong, China.