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. 2006 Oct 18;2006(4):CD000553. doi: 10.1002/14651858.CD000553.pub2

Pera 1991.

Methods Duplicate publication of Teres 1987.
Participants  
Interventions  
Outcomes  
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk D ‐ Not used