6Herbst-Damm K L, Kulik J A. Volunteer support, marital status, and the survival times of terminally ill patients[J]. Health Psychol, 2005,24(2) :225-229.
7Block E M, Casarett D J, Spence C, et al. Got volunteers? Associa tion of hospice use of volunteers with bereaved family members' o- verall rating of the quality of end-of-life care[J]. J Pain Symptom Manage,2010,39(3):502 -506.
10Morris S, Wihnot A, Hill M, et al. A narrative literature review of the contribution of volunteers in end-of-life care services[J]. Palliat Med,2013,27(5) :428-436.
