Kesselheim Aaron S, Austad Kirsten E
Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, USA.
N Engl J Med. 2011 Feb 24;364(8):697-9. doi: 10.1056/NEJMp1100414. Epub 2011 Jan 12.