1 Palliative Medical Unit, Grantham Hospital, Hong Kong Special Administrative Region, China. Electronic address: ashleywcy@gmail.com.
2 Palliative Medical Unit, Grantham Hospital, Hong Kong Special Administrative Region, China; Department of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.
3 Palliative Medical Unit, Grantham Hospital, Hong Kong Special Administrative Region, China.