Pugh MJ, Rosen AK, Montez-Rath M, Amuan ME, Fincke BG, Burk M, Bierman A, Cunningham F, Mortensen EM, Berlowitz DR. Potentially inappropriate prescribing for the elderly: effects of geriatric care at the patient and health care system level. Med Care. 2008 Feb; 46(2):167-73.