Correction to: Molecular Psychiatry (2013) 18, 93–100; doi:10.1038/mp.2012.93

After publication, it was brought to the authors' attention that a reference had been omitted from the reference list. In the sixth line of the left-hand column on page 94, it was cited incorrectly as ref. 20. Instead, the citation should have directed the reader to the following reference.

Takano H, Motohashi N, Uema T, Ogawa K, Ohnishi T, Nishikawa M, et al. Changes in regional cerebral blood flow during acute electroconvulsive therapy in patients with depression: positron emission tomographic study. Br J Psychiatry 2007; 190: 63–68.