Alice B. Kornblith, Jeannette M. Dowell, James E. Herndon, Beverly J. Engelman, Susan Bauer-Wu, Eric J. Small, Vicki A. Morrison, James Atkins, Harvey Jay Cohen, Jimmie C. Holland,
Telephone monitoring of distress in patients aged 65 years or older with advanced stage cancer Cancer. ,vol. 107, pp. 2706- 2714 ,(2006) ,
10.1002/CNCR.22296