RETRACTED ARTICLE: Psychopharmacology

DOI 10.1007/s00213-016-4284-z

The article “A Clock mutation enhances light-phase responsiveness to cocaine in locomotor activity and self-administration with impulsive-like responding in mice”, DOI: 10.1007/s00213-016-4284-z, and the supplementary material published online along with it in Psychopharmacology have been retracted by agreement between the authors and the journal editor, Trevor W. Robbins.

The author Dr. Hongrui Meng acted as corresponding author and submitted the article without the consent of the co-authors. Dr. Meng apologizes to his coauthors, the journal and the readers.