Flinn Denise R, Diehl Kathleen M, Seyfried Lisa S, Malani Preeti N
Department of Internal Medicine, Division of Geriatric Medicine, University of Michigan Health System, Ann Arbor, MI, USA.
J Am Coll Surg. 2009 Aug;209(2):261-8; quiz 294. doi: 10.1016/j.jamcollsurg.2009.03.008. Epub 2009 May 1.