1. School of Humanities and Social Sciences , Chinese Academy of Medical Sciences / Peking Union Medical College , Beijing , China
2. Center of Hospice and Palliative Care , Peking Union Medical College Hospital , Beijing , China
3. The Institute of Ethnology and Anthropology, Chinese Academy of Social Sciences , Beijing , China
4. Institute of World Religions, Chinese Academy of Social Sciences , Beijing , China
5. Department of Geriatric , Affiliated Hospital of Jiangsu University , Zhenjiang , China