| Date | Event | Description |
|---|---|---|
| 5 June 2014 | New citation required but conclusions have not changed | Added five new trials (Agrawal 2009; Hua 2003; Kumar 2013; Prieto 2008; Tiong 2009) in this update. Risk of bias was re‐assessed incorporating additional domains as per current recommendation. Quality of evidence assessed by using the GRADE approach. |
| 5 June 2014 | New search has been performed | Added five new trials (Agrawal 2009; Hua 2003; Kumar 2013; Prieto 2008; Tiong 2009) in this update. Risk of bias was re‐assessed incorporating additional domains as per current recommendation. Quality of evidence assessed by using the GRADE approach. |
| 16 September 2008 | Amended | Converted to new review format. |
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