WITHDRAWN: Group based diabetes self-management education compared to routine treatment, waiting list control or no intervention for people with type 2 diabetes mellitus.

The review authors of this review update are unable to continue with their work. The Cochrane Metabolic and Endocrine Disorders Review Group is seeking very experienced new authors to perform an update on this complex intervention review. At June 2015, this review has been withdrawn. This review is out of date although it is correct as the date of publication. The latest version is available in the 'Other versions' tab on the Cochrane Library, and may still be useful to readers. The editorial group responsible for this previously published document have withdrawn it from publication.