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From:
Arch Intern Med. Author manuscript; available in PMC Sep 21, 2012.
Published in final edited form as:
Arch Intern Med. Jan 25, 2010; 170(2): 170–178.
doi: 10.1001/archinternmed.2009.494
An external file that holds a picture, illustration, etc.
Object name is nihms2304f1.jpg Object name is nihms2304f1.jpg
Figure 1
CONSORT flow chart.