Retracted: Harvey, Eric; Blurton‐Jones, Matthew; Kennedy, Pamela J., Hippocampal BDNF regulates a shift from flexible, goal‐directed to habit memory system function following cocaine abstinence, Hippocampus 29 (11), (https://onlinelibrary.wiley.com/doi/full/10./hipo.23127). The above article, published online on June 17, 2019 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief Dr. Cristina Alberini, and Wiley Periodicals, LLC. The retraction has been agreed due to errors affecting the study's outcomes.

缩回：哈维，埃里克；马修（Blurton-Jones），马修；Kennedy，Pamela J.，海马BDNF调节了可卡因戒断后从灵活的，有针对性的目标向习惯记忆系统功能的转变，海马29（11），（https://onlinelibrary.wiley.com/doi/full/10./ hipo.23127）。以上文章于2019年6月17日在Wiley在线图书馆（wileyonlinelibrary.com）在线发布，经作者，首席编辑Cristina Alberini的期刊编辑和Wiley Periodicals，LLC之间的协议已撤回。由于错误会影响研究结果，因此已同意撤消研究。