Identify the sample used in the researches below by choosing the letter of the best answer: Dunckley, Aspinal, Addington-Hall, Hughes, & Higginson (in Nieswiadomy, 2008) used the staff in one hospice and one nursing home setting in London as their research data. The purpose of the study was to identify facilitators and barriers to the use of the Palliative Care Outcome Scale (POS). Staff took part in semi-structured interviews, completed diaries, and participated in monthly meetings to give their opinions of what they thought were the facilitators and barriers to the implementation of the POS.