RETRACTED: Exendin-4 reverses biochemical and behavioral deficits in a pre-motor rodent model of Parkinson’s disease with combined noradrenergic and serotonergic lesions

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Editor-in-Chief. The article is a duplicate of a paper published in 2012 in British Journal of Pharmacology, 167(7): 1467–1479 (http://dx.doi.org/10.1111/j.1476-5381.2012.02100.x). The duplicate articles were submitted to each journal one day apart and neither paper cited the other. It was not possible to identify this paper as a duplicate at the time of article review and acceptance.One of the conditions of submission of a manuscript to Neuropeptides is that it is not under consideration for publication elsewhere. As such this instance represents an infringement of the journal policy, which can be found via the following link: http://www.elsevier.com/journals/neuropeptides/0143-4179/guide-for-authors