H. Krumholz. JAMA : the journal of the American Medical Association, 306 (7):
754-5(August 2011)7074<m:linebreak></m:linebreak>GR: U01-HL105270-02/HL/NHLBI NIH HHS/United States; JID: 7501160; ppublish;.
M. van Gelder, R. Bretveld, and N. Roeleveld. American journal of epidemiology, 172 (11):
1292-8(December 2010)5789<m:linebreak></m:linebreak>JID: 7910653; aheadofprint;.