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. 2006 Apr 19;2006(2):CD005321. doi: 10.1002/14651858.CD005321.pub2

Kirchner 2005.

Methods See Kirchner 2005 above.
Participants  
Interventions  
Outcomes  
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) Low risk A ‐ Adequate