| Date | Event | Description |
|---|---|---|
| 20 June 2011 | New search has been performed | New search conducted. The review is one of a series of reviews included in an overview of reviews examining methods of pain management in labour and which share a generic protocol (Jones 2011a). This update includes a new comparison (TENS versus sterile water injection). A comparison that was included in previous versions of the review (TENS versus opioid analgesia) is no longer included; rather, it is now included in a review focusing on parenteral opioids (Ullman 2010). These changes were made to comply with the generic protocol and have not altered the conclusions of the review |
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