Date	Event	Description
23 November 2009	Amended	Contact details updated.
12 May 2008	Amended	converted to new review format
12 May 2008	New citation required but conclusions have not changed	This review is an update of a previously withdrawn review. In an attempt to increase clinical homogeneity, the withdrawn review was split, and the current review no longer contains trials on the effects of intradiscal therapy, prolotherapy, or epidural steroids for radiculopathy due to disc herniation. These are topics of current or future Cochrane reviews. As before, the review authors concluded that there was insufficient evidence to support the use of injection therapy in subacute and chronic low‐back pain. However, it cannot be ruled out that specific subgroups of patients may respond to a specific type of injection therapy.
12 May 2008	New search has been performed	The search was updated and eight new RCTs were included for the scope of the current review. In the current review, the internal validity of the RCTs was measured using the eleven criteria outlined in the 2003 Updated Cochrane Back Review Group method guidelines. Half of the RCTs were rated as having a low risk of bias.
25 January 2006	New citation required but conclusions have not changed	Review was withdrawn from publication because it was out of date.