Correction to: Molecular Psychiatry (2015) 20, 150–151; doi:10.1038/mp.2014.56; published online 3 June 2014

Following publication of this paper, the authors noticed an error regarding the direction of the association of clozapine response with polygenic score in the second sentence of the second paragraph in the right column. The corrected sentence appears below.

Furthermore, polygenic risk scores were higher in Cloz+ non-responders compared to Cloz+ responders (P=0.06).