M. P Davis, T Yavuzsen, D Khoshknabi, J Kirkova, D Walsh, W Lasheen, R Lagman and M. T. Karafa
American Journal of Hospice and Palliative Medicine 26 ( 3 ): 180 - 187 , 2009
J Kirkova, D Walsh, A Aktas and M. P. Davis
American Journal of Hospice and Palliative Medicine 27 ( 4 ): 282 - 288 , 2010