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. Author manuscript; available in PMC: 2014 Sep 23.
Published in final edited form as: Cochrane Database Syst Rev. 2010 Aug 4;(8):CD001450. doi: 10.1002/14651858.CD001450.pub3

Figure 1 .

Figure 1 

Methodological quality summary: review authors’ judgements about each methodological quality item for each included study.