The Journal of Neuroscience has received a report describing an investigation by the Karolinska Institutet, which found substantial data misrepresentation in the article “The Existence of FGFR1-5-HT1A Receptor Heterocomplexes in Midbrain 5-HT Neurons of the Rat: Relevance for Neuroplasticity” by Dasiel O. Borroto-Escuela, Wilber Romero-Fernandez, Mileidys Pérez-Alea, Manuel Narvaez, Alexander O. Tarakanov, Giuseppa Mudó, Luigi F. Agnati, Francisco Ciruela, Natale Belluardo, and Kjell Fuxe, which appeared on pages 6295–6303 of the May 2, 2012 issue. Because the results cannot be considered reliable, the editors of The Journal are retracting the paper.