PMID: 18483322 [PubMed - indexed for MEDLINE]
CMAJ. 2004 Aug 17; 171(4):349-50.
[CMAJ. 2004]
Int J Epidemiol. 2007 Oct; 36(5):940-3. Epub 2007 Sep 17.
[Int J Epidemiol. 2007]
Int J Epidemiol. 2007 Oct; 36(5):944-5.
Ann Epidemiol. 2008 Oct; 18(10):746-51. Epub 2008 Aug 9.
[Ann Epidemiol. 2008]
Internist (Berl). 2008 Jun; 49(6):688-93.
[Internist (Berl). 2008]
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