Aoyama M, Morita T, Kizawa Y, et al : The Japan Hospice and Palliative Care Evaluation Study 3: Study design, characteristics of participants and participating institutions, and response rates. American Journal of Hospice and Palliative Medicine. in press, 2016
Simon NM, Shear KM, Thompson EH, et al : The prevalence and correlates of psychiatric comorbidity in individuals with complicated grief. Compr Psychiatry 48 (5): 395-399, 2007