RETRACTED: Ordered groups with a modality

This article has been retracted at the request of the Editor-in-Chief and author. Please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).Reason: Due to an unfortunate oversight, the unrevised and incomplete version of the author's paper was published. The article will be republished in a future issue. The author and publisher apologise for this error.