RETRACTED: Psychological needs and associated factors among perioperative patients with oral cancer.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief, as well as the authors. After concerns about research data were raised by a reader, the journal's editorial board requested a response from the authors, who confirmed errors in analysing and editing the original data. Specifically, a series of 104 survey entries were duplicated during data input. Therefore the authors and the Editor required a retraction of the article.