We have a number of reviews that need updating. Please contact Jane Cracknell if you would be interested in updating a review for ACE. Please be aware that ACE requires that each review team consists of a content specialist, methodologist and a statistician, and that at least one author should have prior experience of performing systematic reviews or meta-analysis. Please also be aware that we require that at least one author be proficient in written English. This person should be responsible for writing the protocol and review. If no author is proficient in written English, then we may well help you find a co-author with appropriate language competence.