Kallenbach Lynne E, Rigler Sally K
Division of General and Geriatric Medicine, Landon Center on Aging, University of Kansas School of Medicine, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA.
J Am Med Dir Assoc. 2006 Sep;7(7):448-55. doi: 10.1016/j.jamda.2006.04.007.