Shrank William H, Polinski Jennifer M, Avorn Jerry
Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02120, USA.
J Am Geriatr Soc. 2007 Oct;55 Suppl 2:S373-82. doi: 10.1111/j.1532-5415.2007.01345.x.