| Date | Event | Description |
|---|---|---|
| 8 January 2016 | New citation required but conclusions have not changed | Conclusions remain the same as in the previous version from 2010 The composition of the author group has been changed from the previous version of this review. The order of the authors has been changed, and Helena Forss has been added as a review author |
| 18 December 2015 | New search has been performed | Search strategies were amended and the search updated This 2016 update contains 4 new included studies involving 1277 participants (Ji 2007; Liu 2012; Salem 2014; Tagliaferro 2011), 2 new excluded studies (de Oliveira 2013; Uma 2011) and 2 new ongoing studies (ISRCTN81071356; ISRCTN17029222) |
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