Anderson Wendy G, McNamara Megan C, Arnold Robert M
Department of Medicine, Division of Hospital Medicine and Palliative Care Program, University of California-San Francisco, 521 Parnassus Avenue, San Francisco, CA 94143-0131, USA.
J Palliat Med. 2009 Oct;12(10):937-46. doi: 10.1089/jpm.2009.9954.